The Women's Murder Club returns in a shockingly suspenseful thriller. Plunging into a burning town house, Detective Lindsay Boxer discovers three dead bodies...and a mysterious message at the scene. When more corpses turn up, Lindsay asks her friends Claire Washburn of the medical examiner's office, Assistant D.A. Jill Bernhardt, and San Francisco Chronicle reporter Cindy Thomas to help her find a murderer who vows to kill every three days. Even more terrifying, he has targeted one of the four friends. Which one will it be?

Detective Lindsay Boxer is jogging along a beautiful San Francisco street as a ferocious blast rips through the neighbourhood. A townhouse owned by an internet magnate explodes into flames, three people die and a sinister note signed 'August Spies' is found at the scene. A wave of violence is sweeping through the city - and it seems that whoever is behind it is intent on killing someone every three days.

Even more terrifying, the four friends who call themselves the Women's Murder Club discover that the killer has targeted one of them. And Lindsay learns that a member of the club is hiding a secret so dangerous and unbelievable that it could destroy them all.