Cornelius, Zira, and Dr. Milo escape the devastating explosion from their home planet in the remains of Taylor's spaceship however they land on Earth in the year 1973. At first the Apes are treated well and accepted with open arms but then President's Science Advisor Dr. Otto Hasslein slowly discovers the horrifying future that awaits man in the Apes future and now wants to kill Cornelius, Zira and also Zira's un-born child. Now Cornelius and Zira are on the run from the US government to help their species and family to survive.