Gone

Jillian "Jill" Conway (Amanda Seyfried) lives in Portland, Oregon with her sister Molly (Emily Wickersham), a college student. Much earlier, Jill was kidnapped by a brutal serial killer who put her in a deep vertical hole somewhere in Portland's 5,100-acre Forest Park (Portland, Oregon). Jill found human remains, used one of the bones to stab her abductor, and escaped from the hole, using his rope ladder. When the Portland police are unable to find the hole, and discover that Jill had been committed to a psychiatric institution after her parents' death, they believe the abduction only happened in Jill's head, and sent Jill back to a psychiatric facility.