GANTZ is based on a hit manga series created by Hiroya Oku and stars leading Japanese actors Kazunari Ninomiya (Letters from Iwo Jima) and Kenichi Matsuyama (Death Note, Detroit Metal City). The film tells the story of two childhood friends that are accidentally killed while trying to save a man's life. Rather than find themselves in the hereafter, however, they awaken in a strange apartment in which they find a mysterious black orb they come to know as GANTZ. Along with similar abductees, they are provided with equipment and weaponry and manipulated into playing a kind of game in which they are sent back out to the greater world to do battle with alien beings, all while never quite knowing whether this game is an illusion or their new reality.