In a late-night showdown, Detective Lindsay Boxer fires her weapon in self-defence. This sets off a chain of events that leaves a police force disgraced, a city divided and a family destroyed. Now everything she's worked for her life hinges on the decision of twelve jurors. To escape the media circus, Lindsay retreats to the picturesque town of Half Moon Bay. Soon after, a string of grisly murders punches through the community. A key detail reminds Lindsay of an unsolved murder she worked on years ago. Lindsay and her friends in the Women's Murder Club battle for her life on two fronts: in court and against a ruthless killer.