In order to earn "cast points" that he can use to buy antidote for the poison injected by his collar, Ganta goes head to head with one of the prison's toughest inmates in a deadly obstacle course.

Ganta is locked away in Tamaki's lab after tangling with Senji, who wields powers similar to his own. While quarantined, Ganta learns more about his new abilities - and discovers that he'll soon have to use them in a fight to the death.