Celia and Alan decide to buy an extravagant sports car instead of an engagement ring. They throw an engagement party at the farm, which descends into chaos for both families.

Celia and Alan's search for a wedding venue leaves them trapped in a haunted medieval mansion. Caroline and John have a spectacular fight in the garden, and Raff moves out of the farm and Paul moves in.

Caroline and Gillian become unexpectedly close when Alan and Celia go missing all night during a thunderstorm. Robbie does what he can to help find them, and John finds out that Caroline's been seeing someone else.