An adaptation of Alan Ayckbourn's comic trilogy of the same name. Three interconnecting plays recount the events of a single weekend. Annie (Penelope Wilton) lives with her invalid mother. Her brother Reg (Richard Briers) and his anally retentive wife Sarah (Penelope Keith) arrive to take care of mother while Annie gets away for a holiday. However, Sarah discovers that Annie has planned a dirty weekend with brother-in-law Norman (Tom Conti).