Holly Hart has been married for 15 blissful years to hubby Alex. Well … if you don't count last Christmas, when she accidentally found a load of sexy texts on Alex's phone. But every marriage has its ups and downs and Alex had a perfectly reasonable explanation … so why can't Holly forget what she saw? With the help of best friends Jeanie and Caro, as well as their handsome neighbour Jack, Holly resolves to settle her mind once and for all with a bit of sneaky detective work. So what if her husband isn't exactly Brad Pitt? He's hers and if someone else is trying to steal him she wants to know who. But the truth is way more shocking than Holly ever anticipated. Can Holly – and her marriage – ever recover from what she discovers?