Having been raised by his adoptive human parents, Charlie is now 15 years old and all set to embark on his high school journey. Upon starting high school, Charlie swiftly befriends Lucy, a scholarly loner. Nonetheless, Charlie's life takes a drastic turn when a cohort of animal-rights extremists, who had freed his biological mother from a research laboratory 15 years ago, returns as terrorists set on abducting Charlie at any expense.