On a trip to her hometown, workaholic Ally reminisces with her first love, Sean, and starts to question everything about the person she's become. Things only get more confusing when she meets Sean's fiancé, Cassidy, who reminds her of the person she used to be.

Two couples on an oceanside getaway grow suspicious that the host of their seemingly perfect rental house may be spying on them. Before long, what should have been a celebratory weekend trip turns into something far more sinister.