Denji was a small-time devil hunter just trying to survive a harsh world. After being killed on a job, Denji is revived by his pet devil-dog Pochita and becomes something new and dangerous--Chainsaw Man!

With the battle against the Gun Devil fast approaching, Aki seems to be having a change of heart. Why is he suddenly willing to give up the revenge he's worked so hard for? And when the Gun Devil finally appears, Denji and allies will face a nightmare of unimaginable pain.