There's nothing closer than sisters ...Unloved by their distant mother, Isabel and Nina cemented their bond in childhood when tragedy struck the family. Many years later, with the difficult birth of Isabel's first child, it is Nina who comes to stay and help out her older sister. But Nina has other, important reasons for being under her sister's roof - not least is Isabel's husband, Richard. Yet the tragedy that drew two sisters together so many years ago still has the power to wrench them apart ...