Former FBI Special Agent Sloane Burbank survived a life-threatening injury sustained in the line of duty, only to face leaving a job she loves in order to recuperate. As an independent consultant, she now uses her specialized skills to train law enforcement and private organizations in crisis resolution. But when one of her closest childhood friends mysteriously disappears, and the woman's devastated parents beg for her help, Sloane takes the case even though her ex-lover Derek Parker is the FBI agent in charge. Special Agent Derek Parker, now assigned to the Asian Criminal Enterprise Task Force in the FBI's New York Field Office, has no time to spare for a year-old case he sees as a dead end especially since it would mean working with a woman he never expected to see again. He's pursuing the leader of a Chinese gang and trying to solve a series of grisly murders in Chinatown, so he initially offers Sloane the case files and minimal cooperation.