In England, some students are mysteriously murdered. A search team is sent out to kill the creature suspected of killing the students. The creature is captured and brought to anthropologist, Br. Brockton. Dr. Brockton realizes the creature is the "TROG" the missing link between man and ape. She decides to study it and educate it. Just as she was making progress, "TROG" escapes and abducts a little girl. Brockton and colleagues franticly search for Trog hoping to find it before the police do.