The Animal Liberation Alliance, an eco-terrorist organization, rescues a pregnant chimpanzee from an animal testing lab--only for it to give birth to a half-human, half-chimpanzee "humanzee" named Charlie! Fifteen years later, Charlie's human foster parents are finally ready to send him to a normal high school, where he makes his first friend: a human girl named Lucy. In the meantime, however, the ALA's stance has become ever more extreme, and now they're here to drag Charlie into their terrorist plot.