One hot sticky summer three very different sisters, each with something to hide, descend on their granny . . .

Susan has just broken up with her fiancé, but she isn't exactly telling the full story . . .

Felicity, elegant and successful, usually spends her brief holidays on top of a mountain or shopping on Fifth Avenue, so how come she's spending so long 'just chilling out' . . .

And Marianne, carefree and feckless, perennially on the run from boyfriends and jobs, what kind of a mess has she got herself into this time?

Add to the mix an intriguing long-lost cousin, and Angela, their long-suffering granny . . . well, something has to give and when it does the girls' lives will be transformed for ever.