Gone (2012)

This is a solid movie. Jill Conway (Amanda Seyfried) arrives home after working the graveyard shift as a waitress and discovers that her sister, recovering alcoholic Molly (Emily Wickersham), is missing. She believes that the same man who kidnapped her a year ago and kept her in a hole now has her sister and will kill her very soon. The police are very skeptical of her claim that this serial killer actually exists, because they couldn't find any evidence before. She decides to look for proof on her own and find her sister before it's too late.