A heart-pounding psychological thriller about friendship and obsession

Philomena 'Phil' McCarthy is a promising young officer in the London Metropolitan police。

But everything changes when she is called to the scene of a domestic assault。 Unbeknownst to her， the abuser is a decorated detective and Phil's efforts to protect his girlfriend - Tempe Brown - from violence result in Phil being unjustly struck from the force。

In the fallout， Phil begins to teach Tempe self-defence and they strike up a tentative friendship。 Tempe is thoughtful and sweet， and within a matter of weeks the two women are inseparable - talking， socialising and confiding their deepest secrets in one another。 But something isn't right。 Sinister things keep happening and， when a body is discovered， Phil realises that Tempe is hiding deadly secrets of her own。 Secrets she is willing to kill for 。 。 。

This pulse-racing standalone psychological thriller from the internationally bestselling author of The Secrets She Keeps is Michael Robotham's finest yet， and confirms his reputation as the Mastermind of Crime。