Review:
Abby is a relatively new stepmom. She's quiet, biddable, and and does as her husband David asks. But as she hears things like her stepdaughter Crystal saying her mom lives in the water, and something about Sheila (Crystal's mom) having committed suicide when David said she'd died of cancer, Abby starts to develop suspicions about her new husband. Then she sees Sheila's ghost. The ghost tells Abby that David murdered her, and Abby has to decide what to believe and what she's going to do about it.
