Plot
At the Parasites Club, the porter reminds club resident Charles Luton that his subscription is overdue. Charles asks to be reminded again later. He goes to the bar, where he tells the barman he is feeling besieged by all his lady friends. The barman suggests he should marry, but Charles says women are too hard to understand, giving as an example his niece, Josephine. Charles depicts her as overly soft-hearted, with a lifelong desire to rescue lame ducks. As an adult, this has translated into falling for weak, shiftless men and trying to "save" them.
Charles is relieved, therefore, when Josephine becomes engaged to a successful businessman, financier Alan Hartley. But then Alan introduces her to his old school chum David Hewer, a would-be playwright living in a squalid garret, seemingly unable to finish a play. For Josephine, David presents the perfect project. Within weeks, she breaks off her engagement to Alan, telling him she has decided to marry David instead, although David doesn't know it yet.
David and Josephine (whom he calls Jo) marry. Under Jo's over-zealous care, David begins to write successful plays. They now live in a remote country cottage. Uncle Charlie arrives and asks to stay for a few days.
One night, Alan Hartley appears on their doorstep seeking refuge. He explains that his business partner has perpetrated a fraud. Although Alan says he was not involved, his signature appears on relevant documents and he cannot prove his innocence. He says he has no choice but to flee abroad, and asks if he can hide out for a few days until his contact rings to let him know the necessary arrangements have been put in place. He tells David, Jo and Charles the coded message he has agreed with the contact, in case one of them answers the call.
As it is now Alan who needs "saving", Jo swings into action, giving him David's dressing gown, slippers, clothes and shaving kit (without asking David) and fussing over him. She frets over the idea of him having to leave his home country and live alone and destitute in a foreign land. Alan admits he has already secured ample funds for his new life, but agrees it will be lonely.
David panics that Alan will be discovered and they will all be arrested. He is also jealous of Jo's re-awakened devotion to Alan. Eventually, while Jo is out taking a stray dog to the vet, they have a huge row. David tells Alan to leave, and storms off to the pub. Uncle Charles goes after him.
Jo returns from the vet to find Alan considering leaving. As she tries to persuade him to stay, the phone rings.....
Charles finds David at the pub, but when David hears he's left Alan alone with Jo, he insists they go home and rushes out. The barmaid asks Charles to pay for a phone call David had made before Charles arrived. Returning to the cottage, they find nobody home. Uncle Charles finds a farewell note from Jo, but hides it from David. Nevertheless, David assumes Jo has run off with Alan and becomes very drunk. He says repeatedly that Jo will never forgive him, but does not explain why. He talks about how smothering and controlling he found her, but insists he still loves her. He also talks about how Alan was well-known, at school, for hatching dubious schemes.
While making their escape in Jo's car, Jo and Alan are stopped at a police roadblock, and Alan readily admits his true identity to the police. They are taken to a police station, where they are told that Alan's partner has been found dead in a Paris hotel room, having apparently committed suicide and left a note admitting full blame for the fraud. Alan again insists to Jo that he is completely ignorant of the fraud and urges Jo to go ahead with their plan to go away together. Jo now realises Alan does not need her and that she must return to David.
Back at home, Uncle Charlie gets Jo to alter her note to say only that she has given Alan a lift and will return. She wakes David and shows him the note. They make up and head upstairs to bed, reconciled.
