<strong>Four women-four friends-share a determination to stop a killer who has been stalking newlyweds in San Francisco. Each one holds a piece of the puzzle: Lindsay Boxer is a homicide inspector in the San Francisco Police Department, Claire Washburn is a medical examiner, Jill Bernhardt is an assistant D.A., and Cindy Thomas just started working the crime desk of the San Francisco Chronicle.<br><br>But the usual procedures aren't bringing them any closer to stopping the killings. So these women form a Women's Murder Club to collaborate outside the box and pursue the case by sidestepping their bosses and giving one another a hand.<br><br>The four women develop intense bonds as they pursue a killer whose crimes have stunned an entire city. Working together, they track down the most terrifying and unexpected killer they have ever encountered-before a shocking conclusion in which everything they knew turns out to be devastatingly wrong.</strong>