Hideo Suzuki is a 35-year-old mangaka assistant, whose life seem to be stuck around his exhausting but low-paying job, unfulfilled dreams, strange hallucinations and unsatisfying relationships. He sees himself as a supporting character in his own life, has low self-esteem, resulting in frustration. One day, the world as Hideo knows it is shattered by the presence of a disease that turns people into homicidal maniacs, whose first instinct is to attack and devour the nearest human.
Higanjima is an eerie island occupied by vampires, from where none has ever come back alive. When teenager Akira hears that his missing brother has been seen in the island, he decides to investigate with several friends.
In the future, the Japanese government captures a class of ninth-grade students and forces them to kill each other under the revolutionary "Battle Royale" act.
