During a weekend-long engagement party, a group of childhood friends discovers a seemingly harmless AI device that allows them to manipulate time in small increments. As the weekend goes on, everyone in the house starts exploiting the device to say and do things that they otherwise wouldn't do - settling old scores and indulging in their worst behavior - since they can immediately rewind and take them back without consequence. But the time rewinds leave emotional scars and the more the device is used, the more the tension builds - until everything comes to a head.