A fierce battle unfolds between Denji and the menacing Samurai Sword. But even after Denji takes one of Samurai Sword's companions hostage, Samurai Sword slashes through them both until Denji is captured. Meanwhile, after seemingly being killed, Makima turns out to be alive. She sets out to rescue Denji with the help of Public Safety Devil Hunters from Kyoto, Kurose and Tendo.

Samurai Sword's vicious attack resulted in many lost personnel for Public Safety Devil Extermination Division 4.

Aki Hayakawa wakes up in a hospital bed, unable to accept the reality of losing Himeno. Kurose and Tendo then appear in front of Hayakawa, letting him know that they are now in charge of coaching him.

Meanwhile, Makima introduces Denji and Power to a member of Public Safety who will act as their mentor in order to strengthen Division 4.

Denji and Power complete their training with Kishibe, while Aki Hayakawa makes a new contract with the "Future Devil" through Kurose and Tendo.

Meanwhile, Makima threatens the yakuza boss into revealing the names of all those who have made contracts with the "Gun Devil," along with the location of Samurai Sword's hideout.

The time has finally come for Public Safety to begin their counterattack against Samurai Sword and his companions.

Sawatari sends the "Ghost Devil" after Hayakawa, and he's nearly killed before the "Ghost Devil" stops and hands him a cigarette with a message from Himeno. The words inside give Hayakawa the strength to kill the “Ghost Devil” and capture Sawatari.

Meanwhile, Denji heads into his rematch with Samurai Sword. With a pull of the starter on his chest, he transforms into Chainsaw Man.

And now, the last battle between Chainsaw Man and Samurai Sword has finally begun...