At the age of nineteen, Kitty McCarthy has decided she is going to live a life less ordinary - although she doesn't know quite how to go about it. What she does know is that she doesn't want to get married and raise children in Liverpool like her elder sisters: Claire, who is a mother-hen, easy-going Norah and elegant Aileen. But Kitty's resolve is tested by the unexpected direction her life takes. The combination of an impetuous youthful decision and a chance meeting twenty years later are to have momentous repercussions that will stay with her forever, and it is her sisters who are the constant thread when other relationships come and go. They know her best, they say, and in the end they know what's best for her - although Kitty would almost certainly disagree...