SFPD homicide detective Lindsay Boxer knows her way around a crime scene.
 
But nothing can prepare her for the shock of recognition: the victim is Warren Jacobi, Lindsay’s onetime partner who rose to chief of police. 
 
A top investigator until the end, Jacobi managed to leave Lindsay a clue. 
 
Following a trail of evidence along the west coast, the Women’s Murder Club pledges to avenge Jacobi’s death before the killer can take another one of their own.