The night before college, a 18 year old girl plans a thunderstorm-themed rave while her step-family’s away. But when her friends bail and her step-dad and step-brother return early from a rained-out trip, things spiral fast. Her step-dad finds the setup and punishes her with the family's odd tradition — “learn your lesson ” Her " step-brother joins in, secretly thrilled, since the whole thing was his idea to begin with. Then their step-mom walks in — flight delayed by the storm, home early — and finds the house in chaos. With tensions crackling like lightning outside, the real storm is just getting started