As team leader of the popular personal security company Troubleshooters Inc., Alyssa Locke is no stranger to dealing with danger. Her next assignment, though, is supposed to be a breeze: teach self-defense techniques to an assemblywoman and her chief of staff after a political controversy generates a blizzard of hate mail -- including death threats. But then, while in New York City, Alyssa and her squad of moonlighting Navy SEALs discover a dead body. And then another one. While investigating a suspect, Alyssa is ambushed and finds herself imprisoned by the deranged serial killer she's been after for years: The Dentist. Cut off from everyone, Alyssa must call upon all of her strength and skill to survive this confrontation with the sadistic monster, meanwhile trusting that her Troubleshooter teammates -- led by her husband, operative Sam Starrett -- will reach her before it's too late.