It should of been the perfect holiday: lazy days with good friends, spent in a pretty cottage by the sea. But when one family cancels, Kath invites Rob, her hunky younger brother, and his current love instead. Then Kath’s father, Giles, whose frosty demeanour and broken arm are hardly harbingers of fun, must come too. All Kath wants is the chance to have uninterrupted sex with her husband. All Rob wants is to find out if he still has a chance with the woman he loves. All Giles wants is to become closer with his daughter, while eight-year-old Anna just wants to be a mermaid.