Good Boy (1970)

Nineteen year old Tommy likes his life as a criminal, and leads his friends in acts of horrifying violence, until one night he is kidnapped by a stranger, Chris. Waking up with a chain around his neck in the basement of an isolated home, Tommy finds himself at the centre of a dysfunctional family dynamic as Chris and his mysterious wife Kathryn try to make Tommy a “good boy”, in a process of forced rehabilitation. The one thing Tommy knows for sure: he must escape.