Pop decides to buy the west wing of the country seat of impoverished aristocrats, the Bluff-Gores, initially for scrap, but Lady Bluff-Gore persuades him to go into the property business. Having rebuffed the advances of urbanite Corinne Perigo, Pop is set up when Mrs. Perigo engineers a situation in which he catches hold of nervous Mrs. Jerebohm to stop her from falling over on a boat. Mrs Perigo encourages the other woman to bring a charge of sexual harassment against Pop.

Pop duly appears in court charged with sexual harassment but Mrs. Perigo is discredited when Pop's brother Uncle Perce, a hotel porter in London, testifies that she is well-known in the big city as rather more of a scarlet woman than she paints herself and the case is thrown out. The day of Mariette's wedding to Charley arrives and, as Charley has no family, the Larkins' friend, the Brigadier, acts as best man after he has got rather cosy with another family friend, the sweet but flirtatious Angela Snow.