Gorilla Jehan has assembled a troop of soldiers to take over Central City and kill Urko but Urko's spies have tipped him off and he ambushes Jehan's renegade soldiers. As Urko pursues the rebels they are killed off one-by-one until only six remain hidden in the mountains. To settle the feud, Jehan and Urko agree to fight in person. Jehan overpowers Urko and is about to kill him when he is stopped by Zaius, who may have known about Jehan's plot beforehand. He allows Jehan to live in exile if he lets a humbled Urko live aswell.