When two girls disappear into the woods and return three days later with no memory of what happened to them, the father of one girl seeks out Chris MacNeil, who's been forever altered by what happened to her daughter fifty years ago.

A group of friends head to a deserted Caribbean island for a surprise overnight bachelor party only to discover that the island isn't deserted. It's actually the home to a secret medical facility. Not only that, there's something wrong with the water surrounding the island...