A young man regains consciousness in an unfamiliar room with no memory of who he is or how he got there. His past is lost – and his future belongs to Inferno, a violent crime syndicate that’s waging bloody war on the mafia underground.

The organization gives him a new name – Zwei – and teams him with their top assassin, the enigmatic Ein. They call her “Phantom”, and she’ll teach Zwei all he needs to know about his new life as an Inferno operative, starting with lesson number one: kill or be killed.