Emily Topper

When Kathy’s family is threatened, she discovers that her husband has kept a chilling secret from her for years: Her teenage daughter is not really her own flesh and blood, and the past is now coming back to haunt them all in a deadly way.

Sara is a teen girl who is looking forward to her 18th birthday to move away from her controlling father Don. But before she could even blow out the candles, Don imprisons her in the basement of their home.