Natty and Sean Wainwright are happily married. Rock solid in fact. So when Natty's oldest friend, Eve Dalladay, appears - just as their daughter collapses on a school trip in France - Natty has no qualms about leaving Eve with Sean to help out at home.Two weeks later and Natty finds Eve has slotted into family life too well. Natty's husband has fallen in love with Eve. He's sorry, he tells her, but their marriage is over. With no option but to put a brave face on things for the sake of the children, Natty embarks on building a new life for herself.And then she receives the note. Eve has done this before, more than once, and with fatal consequences...