When the body of a woman is discovered on a Cambridge common, DCI Barrett and DI Palmer are called in to investigate. But the motive behind the crime isn't clear ... And it all leads back to a book club. As the lies, volatile friendships and tension among the group rise to the surface, DCI Barrett and DI Palmer must work out the motive and track down a cold-blooded killer. But just when they think they are on the right track, a twist in the case throws them off course ...