S1, A1: Sonshin is a young high school boy in China who finds himself caught up in an ancient battle between the forces attempting to revive the emperor Kentei and who would stop them. A mysterious benefactor gives him a choice of cards, which will allow him to summon warriors from the romance of the three kingdoms to do his bidding. He summons the great general Shuuyu, but very quickly finds out that the game is more deadly than he bargained for...