Orphan brothers Jun and Batuhan know only one life: killing strangers in the shadows. But when a long-lost aunt whisks them away to the mysterious Killer Academy, their deadly talent becomes a weapon to be sharpened. They arrive in a land where assassins, demons and fairies fight to rule but as the inter-academy tournament- between the Killers, BlackWings and Yoseis - draws near, the students begin to fall one by one. An unseen infiltrator stalks the halls of Killer Academy and suspicion points everywhere.Expulsion-and death-are closer than ever. Unless the brothers unmask the enigma in time, they may well be the next victims.