Is an adaptation of Willy Russell's play Stags and Hens in which a group of girls and local lads venture out for a night of pre-marriage stag and hen party celebrations.
Ironically, both sexes end up partying at the same Liverpool disco, Brancky's.

Linda, the bride-to-be (Claire Hackett), runs into her old boyfriend, Peter (Con O'Neill), on the eve of her wedding to her fiancée, Dave (Conrad Nelson), Peter, a musician with a single climbing up the pop charts, performs a concert at Bransky's.
Whilst entering the club, Dave, in a drunken stupor, becomes ill from the Indian curry he ate previously and spends the remainder of the evening crawling around the men's lavatory floor.

His mates, including Kas, (Simon O'Brien of Brookside fame [British TV soap]) and gang leader Eddie (Mark Womack) decide to take the law into their own hands when they discover Linda has developed a crush on Peter and has second thoughts about marrying Dave.