A suicide.

A secret.

To the grave.

That was the promise that ten girls made many years ago, and now the time has come when they will be forced to make a choice. Keep the secret and lose their lives, or reveal it and risk the lives of others.

Detective Parker Bell has just returned to work after shooting dead a killer, when he and his partner land the case of a young woman abducted by a man who has left a list of clues pointing to nine other women he plans to kill.

Throughout the course of the investigation Parker meets Tessa Micah, a potential victim and the most interesting, striking, infuriating woman he has ever met, she awakens something inside of him that he thought was long dead.

When Tessa refuses to shed any light on why she is in the sights of a serial killer its up to Parker to find the madman before he can bring his plan to fruition, leaving ten dead women in his wake.