SFPD Sergeant Lindsay Boxer has guns on her mind.There's buzz of a last-ditch shipment of drugs and weapons crossing the Mexican border ahead of new restrictive gun laws. Before Lindsay can act, her top informant tips her to a case that hits disturbingly close to home. Former cops. Professional hits. All with the same warning scrawled on their bodies:You talk, you die. Now it's Lindsay's turn to choose.

With San Francisco under siege and everyone a suspect, the Women's Murder Club must risk their lives to save the city -- and each other. With a beautiful baby daughter and a devoted husband, Detective Lindsay Boxer can safely say that her life has never been better. In fact (for a change), things seem to be going well for all the members of the Women's Murder Club as they gather to celebrate San Francisco Medical Examiner Claire Washburn's birthday....

Lindsay Boxer is learning to love again. After the picture-perfect world she shared with her husband, Joe, and their beautiful young daughter shattered under the weight of Joe's double life, Lindsay is determined to put the pieces back together. But before she can welcome Joe back with open arms, their beloved hometown of San Francisco faces a threat unlike any the city -- or the country -- has ever seen. When the danger hits even closer to home,...

Three victims, three bullets, three cities. The shooters' aim is as fearsomely precise as their target selection. When Lindsay realizes that the fallen men and women excel in a lucrative, criminal activity, she leads the charge in the manhunt for the killers. As the casualty list expands, fear and fascination with this suspicious shooting gallery galvanizes the country. The victims were no angels, but are the shooters villains . . . or heroes?