In May 1996, four teenagers—Jenny, Sean, Heather, and Barry—leave their senior prom after Heather and Barry get into an argument. They are forced to take a detour off the main highway onto a wooded backroad. Heather becomes distracted when she thinks she sees something in the woods, and accidentally crashes into an oncoming vehicle. The other driver exits his car and collapses. Panicked, Jenny, Heather, and Barry leave to find help, while Sean waits with the injured motorist.