In a post-apocalyptic Los Angeles overrun with creatures known as “Devils”; living personifications of human fears, a young man named Denji works tirelessly to get rid of his dept to one of the gangs that rule LA. He spends his days committing petty crimes and hunting down troublesome devils with the aid of his pet devil Pochita, who also happens to be a chainsaw. Unfortunately for him, his loan sharks have double-crossed him and struck a deal with a better devil. Hacked to pieces and thrown away with the trash, Denji's life seems over....
...Until Pochita merges with his body to give him one more shot at life. Denji becomes a demonic creature with chainsaws growing from his arms and head, slaughters the devil that killed him, and is discovered by the professional Devil Hunters that have come to investigate. A mysterious woman named Makima offers him a choice: be slain as a devil, or become her pet and work for her hunting other devils.
