When the Animal Liberation Alliance saves a pregnant chimpanzee from a testing laboratory, they unknowingly welcome the birth of Charlie, a unique 'humanzee' who is half-human and half-chimpanzee. Now, after fifteen years of living with his human foster parents, Charlie is about to enter a typical high school. His first connection with a human peer, Lucy, marks a significant moment. However, as the ALA escalates their radical activities, they aim to involve Charlie in their extremist agenda.