In order to escape from the Eternal Lake, Denji continues to devour unabatedly. But from his now saturated stomach ends up springing out of this man... Even the Demon of Oldness is seized with terror: the infernal negotiations begin! As the unusual becomes the norm and the world sinks ever more into chaos, the advent of the Demon of Death, on which depends the survival of humanity, approaches inexorably. So what is the pact that Denji and Yoru conclude in the face of this destiny?