La hija equivocada

Olivia was abducted from her home the first night her parents left her and her sister Caitlin alone to go to dinner. That was 16 years ago, and Caitlin still feels guilty for not reacting when, in the middle of the night, she saw a masked man leave the house with her sister. Olivia's unexpected return fills the family with joy, as they had lost all hope of ever seeing her again. However, her behavior soon arouses Caitlin's suspicions. Caitlin can't understand why Olivia refuses to speak to the police to try to locate her abductor, nor can she explain why Olivia seems to have forgotten unforgettable memories of their shared past. Is Caitlin paranoid, or is she the only one who truly knows her sister?