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

As Chainsaw Man rampages through the city after an unforgiving loss, Yoru is faced with a difficult decision. What will she sacrifice in order to achieve her goals? Meanwhile, the Aging Devil makes a surprising move in order to get Chainsaw Man to eat him.