NYPD Homicide Detective Nikki Heat arrives at her latest crime scene to find an unidentified woman stabbed to death and stuffed inside a suitcase left on a Manhattan street. Nikki is in for a big shock when this new homicide connects to the unsolved murder of her own mother.

"As a child, Abby Mullen escaped the insidious Wilcox cult when it literally went down in flames. Years later, she's the NYPD's best hostage negotiator and a mother. She thought the worst part of her life was behind her. Until now. Armed conspiracy theorists called the Watchers have attacked the local high school--and taken her daughter hostage. With the delusional Watchers holding her child at gunpoint, the unflappable Abby might be at her breaking...