A special forces team and an American National Space Administration astronaut (Arch) are shadowing John Christopher Brent (James Franciscus)'s spaceship (the rescue mission from Beneath the Planet of the Apes (1970)). Fired upon by a Yautja ship, the spaceship of Arch and the soldiers crash-lands on the Planet of the Apes. Searching for George Taylor (Charlton Heston)'s ship (The Icarus/Liberty 1), Cornelius and Zira encounter the two soldiers that survived their ship's emergency landing. The soldiers threaten the chimpanzee couple, a wounded Predator (an alien Yautja warrior) slays the soldiers. Freshly ejected from her spaceship, astronaut Arch encounters primitive, mute humans, she overhears General Ursus proclaiming that "The only good human is a dead human!", that Taylor has ventured into the Forbidden Zone (the ruins of New York City) and that they should follow and invade the Zone. Gorilla soldiers mounted on horseback assail the wild humans and Arch, the w...