Simultaneous murders in LA, Chicago, and San Francisco: the Women's Murder Club grapples with a case so fast-moving and wide-ranging that at first the crimes seem like a physical impossibility. Reporter Cindy Thomas gets an early scoop, but the case is in SFPD sergeant Lindsay Boxer's jurisdiction. And Lindsay is the first to realize that the shooters' targets have been chosen with horrific precision. The murdered men and women were all known, and feared, criminals. Are the killers vigilantes, coordinating their attacks to make a statement? Is there a war beginning here? While Assistant DA Yuki Castellano clashes with Lindsay in a brutal test of loyalty, medical examiner Claire Washburn faces a potentially fatal crisis of her own. And in the meantime, the hit list expands and the entire nation is transfixed by an ever-growing gallery of murder victims: Where will the assassins strike next? How many targets can there be? The killings come so fast, so close, and are so ruthless that everything is called into question -- even the sacred bonds between Lindsay and her friends in the Women's Murder Club. What would you do if everything you loved and trusted were threatened? Lindsay, Yuki, Cindy, and Claire have to learn the answer -- just as the shooters prepare to attack again.