Kate and Sean are married with 2 children Lucy and Daniel. Kate used to think that they were happy but she has noticed changes in Sean of late. Now on holiday with her best friends from university and their families she finds that he is having an affair and that this may be with one of her friends. More importantly Kate realises that over the ensuing years she has caused problems for her friends and that they in turn know all her secrets. As tensions build and fronts, fall friendships are pushed to breaking point.