Carla Murphy is excited when her best friend asks her to lunch and tells her to bring the baby. Rachel dislikes children and had been distant throughout Carla's pregnancy. But Carla should have known that people don't change that quickly. Lunch was a ruse. Carla emerges from a drug-induced slumber sealed in a room in Rachel's basement with her son gone. Her best friend is no friend. She is obsessed with Carla's husband and will kill them both if she doesn't get what she wants. Carla has no choice. She must help Rachel, her confidant since childhood, seduce her husband—or they all die, and her baby will be lost to her forever.