Shishio is determined to end Senku's life if he does not promise at that moment that he will abandon his idea of recovering civilization as it was before the incident.
Event Year: 2019
Fire the Smoke Signal
Senku has the idea of creating gunpowder to have a way to balance the scale and have a chance to defeat Shishio. The production of gunpowder causes a fire. Shortly thereafter, Senku and the others discover smoke signals on the horizon. An accident? Hardly likely. Apparently there are other people in the stone world …
Weapons of Science
Senku does not trust the motivation of Shishio, so he will try to hide his plans from a new and unforeseen enemy for his plan to revive civilization.
King of the Stone World
Facing immediate danger from wild animals Senku and Taiju are forced to revive Tsukasa Shishio "The Strongest High School Primate". Although Tsukasa has tremendous fighting ability and provides abundant food as their hunter, their new ally harbors an opposing view on restoring humanity.