Denji's a poor young man who'll do anything for money, even hunting down devils with his pet devil-dog Pochita. He's a simple man with simple dreams, drowning under a mountain of debt. But his sad life gets turned upside down one day when he's betrayed by someone he trusts. Now with the power of a devil inside him, Denji's become a whole new man—Chainsaw Man!

Devil Extermination Special Division 4 is in serious trouble as a devil has sent a whole team of assassins to take Denji’s heart. In order to survive the onslaught, Denji, Power and Aki will have to get stronger. But is Denji smart enough to learn how to control his devil powers? Can you can teach an old chainsaw-dog-devil new tricks?