After a furious row with mum Brenda, Gaynor storms out of the house and is stranded up town. The girls come to the rescue, diagnose depression and cheer her up with a romantic mission - to find Paul Walsh, the One That Got Away.

As the girls wake up from a boozy sleepover, Gaynor gets a nasty shock - an invitation to a school reunion. Whether she goes or not, she's finally going to have to face up to all the rumours about why she went and what went wrong.