She has good friends, her best friend Rachel, and she has recently married Matthew, the man of her dreams. One rainy night, she takes the shortcut home through the woods, despite her husband’s constant warnings about traveling alone on such a desolate road. She sees a car stopped by the side of the road with a woman inside. Cass stops her car to see if the woman needs help, but in the heavy rain, fearing for her own safety, she stays in her car waiting for the woman to wave, blink her lights, or get out and ask for help. When nothing happens, Cass eventually drives away confident the woman has pulled over to wait out the storm or she has help coming. The next morning, she learns of the woman’s murder. Overcome with guilt, Cass can’t bring herself to tell anyone she was there and didn’t help.