Megan (Harnois) has been distraught since her twin sister Sophie (Harnois) committed suicide a few months ago. When it comes time for the annual summer solstice trip to a lake house in the bayous of Louisiana with her friends, Megan reluctantly decides to go. Once the five friends arrive, Megan soon begins to suspect that her dead sister is trying to communicate with her as the solstice—the time when our world and the next are closest—approaches. She sees numerous shadow-like figures, mud runs from all the taps, and Megan is "followed" by Sophie's key chain that she keeps getting rid of. Whenever the shadow figure appears, or Megan has a nightmare, the key chain appears.