In a late-night showdown after a near-fatal car chase, San Francisco police lieutenant Lindsay Boxer has to make an instantaneous decision: in self-defense, she fires her weapon – and sets off a chain of events that leaves a police force disgraced, an entire city divided, and a family destroyed. Now everything she’s worked her entire life for hinges on the decision of twelve jurors.
To escape scrutiny during breaks from her trial, Lindsay retreats to the picturesque town of Half Moon Bay. But soon after her arrival, a string of grisly murders punches through the peaceful community. There are no witnesses and there is no discernible pattern. But a key detail recalls a case Lindsay worked on as a rookie years before – an unsolved murder that has haunted her ever since. As summer comes into full swing, Lindsay and her friends in the Women’s Murder Club battle for her life on two fronts: before a judge and jury as her trial comes to a climax, and facing unknown adversaries who will do anything to keep her from the truth about the killings – including killing again.