Alex Cross is a homicide detective with a Ph.D. in psychology. He works and lives in Southeast D.C. and looks like Muhammad Ali in his prime. He's a tough guy from a tough part of town who wears Harris Tweed jackets and likes to relax by banging out Gershwin tunes on his baby grand piano. But he also has two adorable kids of his own, and they are his own special vulnerabilities.

Imagine a killer who thinks, "What is the worst thing anyone has ever done?"—and then goes far beyond it. Now imagine four women—a police detective, an assistant DA, a reporter, and a medical examiner—who join forces as they sidestep their bosses to track down criminals. Known as the Women's Murder Club, they are pursuing a murderer whose twisted imagination has stunned an entire city. Their chief suspect is a socially prominent writer, but the men in charge won't touch him. On the trail of the most terrifying and unexpected killer ever, they discover a shocking surprise.

Two years ago Jack Morgan - the head of the renowned worldwide investigation firm Private - was in charge of security for the World Cup. During the championship match, the action nearly spilled from the field into the stands. Fortunately, Jack and his Private team averted disaster on soccer's biggest stage. Now he has returned to Rio to secure the Olympics. But before the torch is lit, the threats come fast and furious when Jack discovers that someone in Brazil will stop at nothing to sabotage the games.

Attorney Rhonda Bird returns home after a long estrangement when she learns her father has died. There she makes two important discoveries: Her father stopped being an accountant and had opened up a private detective agency, and she has a teenage half sister named Baby. Baby brings in a client to the detective agency, a young man who claims he was abducted.

When Jack Morgan opens the Mumbai branch of Private, the world's most elite detective agency, he hands the reins to top agent Santosh Wagh. Now, in this teeming metropolis of over 13 million people where the guilty have everywhere to hide, Santosh goes on the hunt for one elusive killer. A killer who is targeting seemingly unconnected women and placing strange objects at their death scenes in a series of chilling rituals.