For Hannah Shapiro, a beautiful young American student, this particular nightmare began eight years ago in Los Angeles, when Jack Morgan, owner of Private—the world's most exclusive detective agency—saved her from a horrific death. She has fled her country, but can't flee her past. The terror has followed her to London, and now it is down to former Royal Military Police Sergeant Dan Carter, head of Private London, to save her all over again.

Hired to protect a visiting American woman, Private Johannesburg's Joey Montague is hoping for a routine job looking after a nervous tourist. After the apparent suicide of his business partner, he can't handle much more. But this case is not what it seems - and neither is his partner's death.

Thom and Jennifer Harlow are the perfect couple, with three perfect children. They maybe two of the biggest mega movie stars in the world, but they're also great parents, philanthropists, and just all-around good people. When they disappear without a word from their ranch, facts are hard to find. They live behind such a high wall of security and image control that even world-renowned Private Investigator Jack Morgan can't get to the truth.

A wealthy businessman approaches Jack Morgan, head of Private—the world's largest investigation agency—with a desperate plea to track down his daughter and grandchildren, who have disappeared without a trace. What at first seems to be a simple missing persons case soon escalates into something much more deadly, when Jack discovers the daughter is being pursued by highly trained operatives. As Jack uncovers more of the woman's backstory, the trail leads towards Afghanistan—where Jack's career as a US Marine ended in catastrophe.

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.