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.