Chaotic – a game of stealthy strategy, incredible Creatures and miraculous "Mugic" – is sweeping the globe. Players trade unique, coded Chaotic cards online and in person. When Tom's best friend – rabid Chaotic fan Kaz -- insists Chaotic is a real place where players can transport to and do battle, Tom writes it off as a fantasy gone too far. But when Tom receives a mysterious password via his Chaotic Code Scanner, he learns the amazing truth and embarks on the adventure of a lifetime!
Tom's first match in Chaotic is off to a shaky start. No one told him that, when you play in the Chaotic BattleDromes, you become the Creatures! Soon, Tom discovers there are even greater surprises in Perim, the world outside Chaotic. As he reels from the reality of his "split personality" created by Chaotic technology, he struggles to survive his shocking "ScanQuest" in Perim while he races to recover his discarded scanner back on Earth.
Tom and Kaz head to Castle Bodhran in Perim to recover Reggie's missing Scanner, but Tom finds himself wagering his prized card Maxxor in a Challenge Match. Tom and Kaz are captured by Maxxor in their search for Reggie, and Tom and Maxxor must overcome their distrust for each other for their own survival, against the Mipedians.
Peyton wants to trade Mipedian creatures for Tom's scan but Tom declines as he distrusts them after what happened with Reggie and Mudeenu. He says Overworlders are better so Peyton takes him to the Mipedian desert. Tom's opinion changes when he and Peyton are attacked by an evil scorpioid Overworlder named Slruhk.
Kaz tags along with Tom hoping to get a new scan of his hero, the mighty Maxxor. Their quest takes the two friends across Perim, where they are caught in the crossfire of a volcanic battle, then brave a treacherous trip through the ghastly Gloomuck Swamp. As Tom and Kaz close in on their goal, they are shocked to learn that the greatest peril they face is Maxxor himself!
When Kaz and Peyton's 'friendly' squabble spins out of control, Tom decides the only solution is a 'Scavenger Scan' match. Kaz and Peyton have one hour to scrape up all the scans they need for a match. The clock is ticking as the desperate duo speed through Perim, scavenging scans and dodging danger – then it's off to the BattleDrome for the most chaotic Chaotic battles ever.
Tom and friends face their greatest Chaotic challenge ever – the all-powerful, all-terrifying, all-destructive Allmageddon Attack. The only hope to combat this fearsome force lies in a crazed creature named Hoton. Can our heroes find a way to stop the unstoppable before Peyton gets Allmageddoned? Little do they know, Peyton has a plan to beat it.
Tom finally has a new scan of Maxxor, but when he transforms into the awesome OverWorld leader during a Drome match, Tom makes a startling discovery – the once brave warrior is now a quivering coward. Seeking to unravel the mystery of Maxxor's illness, Tom must 'port to Lake Ken-i-po to consult with Najarin – if he can survive the Mugic trap inside the old wizard's castle.
Kaz's scanquest in the Crystal Range goes south when Pyrithion traps Blugon in an energy field before heading up the mountain to attack Raimusa. With Blugon unable to deliver to his friend the Battlegear and Mugic he needs to beat Pyrithion, Kaz must brave a treacherous shortcut to get the delivery to the summit in time. Tom battles in the Drome with a kid who has scans of the shortcut, and guides Kaz.
When Tom, Peyton, and Kaz sneak into Castle Mommark to scan some of the geneticist's latest experiments, Peyton accidentally releases the cute little starfish creature Stelgar into the wilds of Perim. Out in the sunlight, Stelgar turns into a giant, rampaging monster. Can Peyton find some way to safely stop Stelgar before Mommark's followers destroy him?
After seven victories in the Crellan Drome, Tom is challenged to another match by CodeMaster Crellan. In preparation for his match, he scans Mugic that he is tricked by Klay and Krystella into believing it will double his power, but it really switches their stats. Can Tom overcome this bump in the road and defeat CodeMaster Crellan?
Ulmar has created a machine that will port the UnderWorlders to Chaotic. However, his machine causes wormholes to appear through Perim causing the UnderWorlders, the OverWorlders, the Mipedians, and the Danians to appear in Chaotic. Kaz is forced to choose sides as he learns that the creatures of Perim are planning an invasion of Earth.
Tom ports to Prexxor Chasm, the Location scan he won after defeating Codemaster Krellan. When he does get a scan of its bottom and faces off against Peyton, both of them have an encounter with a slimy thing that's not even a creature. A thing that has Smildon and the other inhabitants of Prexxor Chasm frightened.
Tom finds himself facing and losing to an increased number of UnderWorld deck players, so he decides to use an UnderWorld deck of his own. Kaz is thrilled and decides to help him out until his friend ends up on a hot winning streak without his help. Thinking that his friend will end up as a better UnderWorld player, Kaz secretly tries to convince Tom to turn back to his Overworlders.
Tom flees to Perim after Kaz accuses him of cheating. While working with Bodal, Tom meets a Chaotic player named Simon and his followers who have located rare locations. Tom didn't know it yet, but Simon and his followers are secretly using explosive BattleGear to detonate those locations after they scan them. With the help of Sarah, Peyton, Kaz, and Codemasters Crellan and Imthor, Simon's plot was thwarted. It turned out that Tom and Kaz's match was a ruse to cover up them learning from Maxxor about what's recently been happening in Perim.
During a scan quest, Peyton and Sarah encounter the biggest fighter they've ever seen. Kaz, Tom, Sarah and Peyton decide to track down the giant. But trouble comes for Kaz he bumps into a little creature called Hammerdoom Chantcaller who challenges Kaz to the coliseum and he has to battle or be banished from the Underworld.
Peyton is beaten by Kaz and wishes to make the ultimate Drome match, but Sarah drags Kaz to Mount Pillar instead to locate a Danian BattleGear called the Mandiblor Crown (which she threw down a garbage chute after being found out by the guards) as a way to repay her for obtaining a scan of Geltod. Meanwhile, Peyton and Tom face off in a match with 105 creatures on each side. Both of them get tired and sleep at the end.
Tom and Kaz go on a topsy-turvy adventure when they look for Sarah and Peyton in Kirvak Mound (a series of cavern within Skeleton Springs). They soon discover that the effects of Kirvak Mound has deaged Sarah to a little girl and aged Peyton to an old man. They now have to evade prehistoric creatures to find their way back. When they look for Sarah, they find other portals leading to various points in history which would lead to various futures. It is later discovered by Rhaden that the portals in Kirvak Mound are actually possible futures of what will happen to Perim
Battling in the Crellan Drome, Peyton faces his most fearsome foe ever -- a huge Creature with a titanic temper and pulverizing powers, known as a Mipedian Warbeast. A player named Connor, with help from Klay and Krystella, tricks Peyton into trading 20 of his cards for a scan of the Mipedian Warbeast Blazvatan. But after Connor giving him a bit of advice, Peyton searches for the one type of creature that can tame the WarBeasts: Conjurers. Peyton and Klay battle: Warbeast VS. Warbeast.
An unusual UnderWorld Creature named Phelphor is found frozen inside Ice Pillar by UnderWorlders. In the castle, Chaor, Agitos, and Takinom are amazed by Phelphor's tale of a lost tribe called M’arrillians and their discovery of the Cothica, Perim's greatest treasure, which they hold behind the Doors of the Deep Mines. Chaor states they will discuss opening the Doors to retrieve the Cothica.
Chaor and Lord Van Bloot's armies fight, with Chaor going after Phelphor. Phelphor mind controls the guards into opening the Doors of the Deep Mines first, letting out a flood of murky brown water that washes away everything in its path. Tom, Kaz, Peyton and Sarah scan the door as it opens but are forced to port to keep from being washed away.
When Kaz and Peyton are at the Lava Pond to obtain a scan of Zapetur, they are attacked by the M'arrillian Milla'iin, who is doing mysterious work with a hypnotized Khybon. Tom, Kaz and Peyton battle for the attention of a beautiful newbie named Shinwan who exhibits her skill in the Battledome by defeating Klay in her first ever drome match.
Raznus, having been assimilated into the Danian Tribe, returns to Kiru City with Danian warriors. They are accidentally discovered underneath Bodal's arsenal and capture Tom, Bodal, and Olkiex. Odu-Bathax decides to raid Kiru City so Kaz runs off to get Maxxor, only for Intress to tell Kaz Maxxor is in the Riverlands.
Sarah is kidnapped by a ghostly Mipedian creature when she and Peyton are on a scan quest. Sobtjek and the other Mipedians learn the M'arrillians have flooded Ropa'Sahhk Desert where the Conjurers live from one of them, Scara. Scara advises they need to join forces with the Warriors of Owayki and Sobtjek takes a squad there.
During Kaz's second attempt to rescue H'earring, Chaor and the UnderWorlders plan to ambush the M'arrillians in a fiery trap involving Ulmar's Annihilizer near the oil-filled Marsh of Murk. Kaz ends up mind-controlled and Tom tries to rescue him while Sarah and Peyton look for a new battlegear called a Mindbander that can negate the hypnosis.
Tangath Toborn and his fellow OverWorlders must form an army from the Danians and the Mipedians. Meanwhile, Tom, Sarah, and Kaz go up against Peyton in a training drome match against Peyton's Erak'tabb. During the training, the OverWorlders, Danians, and Mipedians encounter Lystone who ended up controlled by the M'arrillians. After she is stopped, Tangath Toborn continues to train them.
The Codemasters initiate an emergency order to recall all Chaotic Players and shut down the Transport Systems as Perim is too dangerous with the M'arrillians about to conquer it. While Tangath Toborn leads a group to Glacier Plains to attack the M'arrillian base there trying to melt the glacier and flood the Overworld, Phelphor's army surrounds Kiru City.
When CodeMaster Hotekk's defeated Creatures join forces, it looks like Tom won't win his latest CodeMaster Match. But a shocking series of amazing events allows Tom and his friends to transport to a strange, primitive location that ultimately unlocks a secret that could change the course of Chaotic history.
Troubled that the leader of the Ancient OverWorld is an ancestor of Chaor, Tom goes to see Najarin to learn more about the history of Perim. Puzzled by Najarin's strange behavior, Tom returns to Ancient Kiru City to discover it has been attacked by Kaal, a diabolical UnderWorlder who holds the pre-historic Perimites in his fiery clutches.
Kaz decides to settle some old Chaotic scores by playing a series of grudge matches with his Ancient Creature scans. But his friends worry that he may accidentally reveal their secret portal to the past. Kaz's rematch marathon is super-successful until he challenges the sinister Sam Shady, who has a secret of his own!
Just as a massive monument to Chaor is about to be completed, Ulmar nervously gives the UnderWorld leader some shocking news: Ulmar has created a new army of gigantic robots called "Gigantropers." But his battling behemoths are out of control... and they're marching toward the Iron Pillar with a plan for devastation that even Chaor can't stop!
Now that the secret of Dranakis Threshold is out, Krystella and Klay devise a devilishly clever plan for making their Ancient Creature scans the ultimate collectors' items. To reach their goal, they call on the evil exiled rebel Van Bloot and, together, hatch a scheme that will make him the leader who seals Perim's fate for all time!
Kaz's obsession with scanning Kaizeph, the Lost City of the Elements, leads each of the four friends on a perilous, personal ScanQuest to capture the code of the mysterious "Elemental Servants." They ultimately face off in a four-way battle to determine which Elemental Creature can conquer all the rest.
Maxxor is confronted with the most agonizing decision of his life when Batog, an unstoppable creature out for vengeance, invades the OverWorld and presents an impossible demand: unless he battles Tangath Toborn, Perim will be destroyed. With Tangath still trapped in the ice at Glacier Plains, Maxxor must choose between his friend's life or his world's survival!