Treyni the Dryad has come to confirm that an Orc Lord has risen. Not only that, his army of orcs are afflicted with “Starved”, a skill that allows them to gain the power and abilities of whoever they eat…including each other. This is an enemy that must be defeated with as few casualties as possible, lest they unwittingly refuel the army.
The Dryads know that no one of the groups of beings who dwell in the forest could take on the army, so they’ve reached out (through the potato chip-stealing Treyni) to the most powerful among them: Rimuru Tempest. Shion volunteers on her master’s behalf, but privately Rimuru is worried about losing. He’s never faced someone with an ability like his “Predator”, after all.
Souei volunteers to be Rimuru’s envoy with the Lizardmen, whose numbers Rimuru will need to achieve victory. Impressed by Souei’s intense Kajin aura, and the fact he’s only a mere messenger for an even more powerful master, the Lizardman Chieftain agrees to an audience with Rimuru in seven days’ time.
Before those seven days are up, however, everything gets messed up, all thanks to our overly-preening Chieftain’s son, Gabiru. Gelmud plants an underling named Laplace to easily manipulate Gabiru into staging a coup against his father, who has agreed to maintain a defensive stance but has alienated his younger comrades by doing so.
Gabiru gives those youngsters what they want: the opportunity to fight their enemies head-on rather than continue hiding in the caves. But since Gabiru imprisons his father and sister before hearing them out, he doesn’t learn about the orc army’s Starved ability until the orcs begin to eat their own dead. Rimuru was surely right to worry!