Luke has a 25th birthday party, but his mind is elsewhere having met with his estranged father. While dad Rob is eager to make up for lost time, Luke is unsure whether he wants to get to know him. Meanwhile, Stella and Sean step into the boxing ring, where a practical joke leads to a close shave when Sean receives a killer blow.

The weekend of the stag and hen parties arrives, and while the girls head for a hotel and spa break, Dai saves the boys from a Grease-themed event by taking them camping in Brecon. However, Stella is devastated when she hears Luke is considering moving to Canada to live with dad Rob.