In a future where humans have largely disappeared and apes have risen to prominence, a young and ambitious ape named Cornelius emerges as a potential leader. Living in a society where apes have their own structured civilization, Cornelius grapples with the ghost of his legendary father, Caesar, while attempting to carve out his own path. As tensions rise between different tribes of apes, Cornelius finds himself caught in a power struggle that threatens to disrupt the fragile peace. His closest ally, Delia, helps him navigate the treacherous political landscape while they uncover remnants of human technology that may hold the key to the past and future.

Cornelius soon faces an even greater challenge as a formidable threat looms on the horizon, one that could upend their entire society. He must unite his people and work with rivals, including the hot-tempered Atticus, to confront this new danger. As they journey into uncharted territories, they encounter creatures and relics that provide clues about the history of both apes and humans. Cornelius struggles with his leadership responsibilities and the legacy of Caesar while coming to terms with his own beliefs and the destiny of his species.