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.

Senku continues in trying to advance the Stone World, this time he makes "space food", it is in actuality cup noodles. After Senku finishes his project, Gen has an epiphany and devises a plan to take down Tsukasa's army without violence.

Kohaku has located the treasure left behind by Byakuya and the others, but it's encased in concrete. Senku has to devise a plan to quietly get at the contents inside, so as to not alert the guards.