An
anime/manga series set a few years after a severe earthquake in Japan. A floating man in a red suit comes into a high school classroom and kills all the students except for one, Ganta Igarashi. Ganta is accused of murdering all his classmates and sent to an amusement
park-like prison called Deadman Wonderland, aka the most twisted prison in the
world. Prisoners are forced to battle each other on live
TV, have body parts removed, etc. While at the prison, Ganta discovers his "Branch of
Sin," the ability to manipulate his own blood. As he learns more about this ability, he starts to realize he
may finally break free, and get revenge on the Red Man that murdered his friends.