Don’t Dress For Dinner centers around Bernard and Jacqueline, a not-so-happily married couple, both of whom are having extramarital affairs. As Jacqueline prepares to go out of town to visit her mother, Bernard invites his mistress and Robert, his best friend (and also Jacqueline’s lover, unbeknownst to Bernard), over for the weekend. He’s even hired a Cordon Bleu chef to cater the evening. Jacqueline discovers Robert is coming to town and cancels her trip, causing Bernard to panic. When Robert arrives, Bernard asks him to pretend Suzanne is Robert’s mistress. Robert mistakes the chef (Suzette), for Bernard’s mistress (Suzanne), producing a highly complicated dinner of hilarious hijinks, secret trysts and slapstick comedy.