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Dr. Paul Vernon (Tony Britton) is a gynecologist who is estranged from his wife in this situation comedy of errors. He gets drunk at a party, picks up a pretty French girl and takes her home for a night of pleasure. The perplexed physician wakes up to find the French femme has spent the night in the other room. He then decides to offer her a job as his housekeeper. Things go smoothly until wife Lisa (Anne Heywood) shows up and announces she is pregnant. To complicate matters, the French maid is also with child. The noble doctor devises a plan to have his wife claim both children, keeping the single maid from shame. Lisa agrees to pretend she will give birth to twins. The plan goes haywire when the doctor discovers both women are pregnant with twins.