Hardcore (1979) DVDRip

A few days after seeing his only daughter, quiet teenage Kristen, off on her youth group's trip to California, Grand Rapids businessman and strict Calvinist Jake VanDorn receives the worst phone call a father could ever get: Mysteriously, his beloved Kristen has disappeared. As the police seem unable to help, desperate Jake hires private detective Andy Mast to trace his daughter. Instead, the investigator returns with an 8mm hardcore porn movie in which the missing minor is performing. Jake has no choice but to delve deeply into South California's obscure underworld of prostitution to bring her back. But who knows where she is?