Joanna Kendall faces a moral dilemma after unintentionally striking a young girl with her vehicle. When she leaves to seek assistance, she comes back to find bystanders in shock and anger, condemning the driver who fled the accident. Overwhelmed by fear and uncertainty, Joanna chooses to keep quiet about her involvement. This decision sets off a chain of events, forcing her, an otherwise ideal wife and mother, to confront her own guilt while dealing with a persistent female detective who has her suspicions.