Lake Charles in Louisiana is the idyllic spot to catch some sun and enjoy the tranquil miles of freshwater. When a group of 20-something's meet up at their island lake house for a weekend of partying, one of the friends never shows up. As more lake visitors are yanked underwater by what seems to be some giant alligators, the screams bring the group out of the lake house. Frantically discovering their boat has drifted away, they have to watch helplessly as more of their friends are pulled under the water. Will anyone get off the island alive, in one piece? Something more sinister seems to be at play.