Jo and Maz are best friends despite being so different: Jo is ambitious, driven and unsure about commitment whereas for the last 15 years Maz's life has centred on home and her demanding mother. As their children, talented musician Matthew and the appallingly behaved Amber, grow up together and their partners, Dennis and Trevor, also become friends the fabric of the two families' lives becomes closely interwoven. But when Jo throws Dennis out after a disastrous 50th birthday party organised by Maz everything is thrown into confusion. How could Otis, Jo's boss, believe she wanted an affair? Could steady, reliable Trevor be seeing someone else? Why won't Jo reveal who Matthew's father is?With the death of Maz's mother and the reappearance of someone from Jo's past, friendship cracks under the strain, forcing both women to confront what it is they want from life and from each other.