Tired of constantly being defeated by Battle Force 5, the Vandals and the Sark join forces to form an 'Axis of Evil,' and fake their demise in a plan to seize the Battle Keys. Meanwhile, the BF5 try to find a solution to Sage's dependence on the Mobi.
The Battle Force 5 are transported 1,000,000 years back to the Sentients' distant past! Not only must they battle their way back home in an ancient gladitorial game, but they must make certain history unfolds the way it was originally supposed to.
The Battle Force 5 learn of Grimian's alliance with Krytus! Meanwhile, Tezz's scientific curiosity gets him captured by the Vandals!
Pursued by the Red Sentients, Zemerik and Zug flee to the Torborian Badlands. While Krytus pursues him, the Battle Force 5 seek vital information from Zemerik's hard-drive that would mean the end of the Sark!
When the Vandals attack the Kharamanos homeworld, the Battle Force 5 must help the Kharamanos stop the Vandals once and for all!