Mia has her life in order. She is a grown up and enjoys a grown up's relationship with Pete. Not passionate or spontaneous, but solid. She knows he is 'the one'. But then she sees a text message on Pete's phone that throws her world into a spin. It is more than friendly, signed off with a kiss, and Mia has never heard of the sender, Liz. With her carefully mapped out life sliding out of control Mia will discover a side to herself she never knew existed, as she formulates a plan to win her happy ending. Because all's fair in love and war – isn't it?