With their wit, charm and a little bit of cunning, the Larkins woo Charley the Tax man. Mariette agrees to put her plans on hold and stay free for the summer.
Ma is worried that Pop is working too hard and books a weekend in Margate, leaving Charley and Mariette to mind the kids. Margate, however threatens to be a let-down.
News reaches Pop that the train station is to close. With the help of reluctant Miss Chand and villagers, Pop seizes the opportunity to save the railway - and make money along the way. Mariette fights with Pauline, and Charley makes a big decision.
The Larkins dash to the railway station and manage to stall Mariette's departure to France. They convince her to stay for a donkey derby/gymkhana and cocktail party in a few days.