Amber and Kyle are ready to move on after a car accident two years ago. But their world turns upside down when Jessica, the other driver who lost her unborn baby in the accident, moves in next door and gets a job with Amber's doctor -- all in a plan to seek a cold form of revenge.
Years ago, heartbroken and officially separated from her husband, Caroline briefly turned to the arms of another man. It was only one small indiscretion - a brief affair, forgotten after she and her husband reunited. But beautiful Elle, daughter of Caroline's lover, hasn't forgotten. She rents a guesthouse from Caroline, her husband, and teenage son with one purpose: to destroy their lives the way Elle thinks Caroline destroyed hers.
Two paramedics arrive at the site of a car accident to transport an injured teenage girl to the hospital. However, instead of taking her to the hospital, the strangers bring her to a home of a woman whose daughter just died.