Three years have passed after the end of the Legion Mate arc. Chrono Shindou, an independent and apathetic teenager, finds a Vanguard deck and a map in his school locker one day. After school, he follows the map to a card shop, Card Capital 2, where he sees his first cardfight between Mamoru Anjou and an older Kamui Katsuragi, who works part-time at the store. When Chrono shows Kamui his deck, Kamui is shocked that the deck is of a never-before-seen clan: Gear Chronicle. Kamui decides to have a cardfight with Chrono, who has never played Vanguard before. So, Kamui teaches Chrono about the lore and rules of Vanguard as they play. When Chrono is driven into a corner, he hears a voice that tells him about Generation Stride, or an "alternate future". This is an ability that allows Chrono to stride a new unit from the Generation Zone, and it manages to give him the victory over Kamui. Afterwards, having been emotionally moved by that cardfight, Chrono runs off to see his "alternate future" while passing by a certain someone...
