Gwen's birthday is coming up and Bryn wants to organize a surprise party for her but is dismayed that nobody seems to want to come, so he has to consider asking people she dislikes. Eventually he manages to get together a line-dancing evening, where he and Nessa perform 'Islands in the Stream' but the real surprise of the evening is the unexpected arrival of Stacey's musician brother Jason. For Gavin the shock of the night is when Stacey tells him she feels isolated in Essex and is leaving him to remain in Wales.