In a post-apocalyptic world, humanity has been devastated by a deadly virus known as the "Simian" that has annihilated much of the population. Meanwhile, the apes, led by Caesar, have evolved and formed a thriving society in the forest near San Francisco. The tranquility of their new life is threatened when a group of surviving humans, led by Dreyfus, seeks to restore civilization and, desperate to survive, stumbles upon the ape colony.
When the humans attempt to access an old electric generator that could provide them with power, things become complicated. The tension between both species quickly escalates, and the peace that Caesar has worked hard to maintain is severely compromised. As a group of apes, led by the resentful Koba, questions Caesar's peaceful vision, the humans face their own internal struggles, torn between the need for an alliance or the desire for destruction.
As conflicts and betrayals arise, Caesar finds himself caught between two worlds, struggling to find a path that ensures survival for his species and the human survivors. The movie depicts intense confrontations, themes of trust, and the search for identity, leading to an explosive climax where the fate of both groups hangs in the balance. In the end, the decisions made will shape the future of Earth in a new world order.