I Know My First Name Is Steven(1989)

In 1973, 7-year-old Steven Stayner is kidnapped by pedophile Kenneth Parnell. Under the belief that Parnell has been given legal custody of him, and that his family has moved away, he stays with Parnell for seven years, enduring repetitive sexual abuse the entire time. Finally, in 1980, when Parnell kidnaps another young boy, Steven finds a way for them both to escape and return home.