Highly intelligent Caesar (Andy Serkis) and his ape colony are engaged in a heated battle with power-hungry humans. At the loss of several apes, Caesar is enraged and vows to avenge his fallen primates. To do so, he knows he'll have to combat the leader of the humans, a merciless Colonel (Woody Harrelson).

Whichever way the battle goes, the fate of apes and the future of planet Earth hang in the balance.

This film is a direct follow-up to Dawn of the Planet of the Apes.