Cass is having a hard time since the night she saw the car in the woods, on the winding rural road, in the middle of a downpour, with the woman sitting inside --- the woman who was killed. She’s been trying to put the crime out of her mind; what could she have done, really? It’s a dangerous road to be on in the middle of a storm. Her husband would be furious if he knew she’d broken her promise not to take that shortcut home. And she probably would only have been hurt herself if she’d stopped. She just can’t forget that woman, the woman she might have saved, and the terrible nagging guilt. Or the silent calls she’s receiving, or the feeling that someone’s watching her.