Waking in the bridal suite on his wedding day, Bill finds a strange girl in his bed. With a post stag-night hangover he has no idea who she is or how she got there. As he panics to get her dressed and out of the way, his bride arrives trapping the girl in the bathroom. In desperation, Bill persuades the best man to pretend she's his girlfriend but they can't afford the real girlfriend to find out. By the time the bride's parents and hotel staff get in on the act, the chaos reaches nuclear proportions! Hilarious.