The Animal Liberation Alliance, a radical eco‑terrorist group, rescues a pregnant chimpanzee from a laboratory testing facility—only for the animal to deliver a half‑human, half‑chimpanzee hybrid named Charlie. Fifteen years later, Charlie"s human foster parents decide to enroll him in a high school, where he befriends a girl named Lucy and he quickly adapts to the environment. Meanwhile the ALA"s ideology has hardened further; they now plan to coerce Charlie into their violent agenda, dragging him into a terrorist plot.