Disney spoof of gold-rush sagas, with a Boston butler learning to fend for himself in the wild and woolly West.

In the near future, a plague has wiped out all of the cats and dogs. As a result, apes began to be kept as pets and eventually slaves. One ape, Caesar, son of talking apes from the future, leads a revolution to free the apes and take over the planet.

Cornelius, Zira and Dr. Milo, three apes from the future, escape from their planet as it is being destroyed and land on 20th century Earth where they are taken to the Los Angeles Zoo for examination. When Zira reveals their ability to speak to a psychologist, the apes are treated as curiosities. However, when the U.S. government begins to believe their story that the Earth will eventually be inherited by apes, it decides to hunt the couple down as...