Josie Flynn is in New York for the wedding of her American cousin Martha. Having just been through a messy divorce, she isn't really in the wedding spirit, especially when she thinks Martha is about to marry the wrong man - and Josie isn't afraid to tell her so. Which is all very noble until Josie meets Matt Jarvis and appears to be about to fall for the wrong man herself. Add to that the return of her ex-husband, an old flame and a dubious boyband and it looks like it's going to be quite the wedding . . .