An explosive loner and his slacker best friend are waylaid from their journey into legend, only to find that their story is just beginning.

为了阻止原始兽得到行星盖亚上的神秘能源——阿古莫亚。巨无霸在白狮擎天柱的率领下，与威震天率领的机械军团展开了战斗。