Set in 1920s London, the play follows Julia Sterroll and Jane Banbury, two upper-class friends whose husbands, Frederick and Willy, leave for a weekend golf trip, leaving the women alone in their lavish apartment. The women share a secret: both had passionate affairs with the charming Frenchman Maurice Duclos before their marriages. When postcards arrive announcing Maurice's imminent visit, the women panic, torn between excitement and guilt over lingering attraction. The play is celebrated for its raucous humor, witty dialogue, and period charm, highlighting themes of female desire, marital dissatisfaction, and playful rivalry.