Imagine nine women meeting. Tea and cake are on the coffee table. They've come together to share their love of books. They are friends. They trust each other. It's a happy gathering. What could be more harmless? Scratch the surface and look closer. One is lonely, one is desperate and one of them is a killer. When the body of a woman is discovered on a Cambridge common, DCI Barrett and DI Palmer are called 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.