Picking up where Frozen Heat left off, top NYPD Homicide Detective Nikki Heat pursues the elusive former CIA station chief who ordered the execution of her mother over a decade ago. For the hunt, Nikki teams once again with her romantic partner, Pulitzer Prize-winning investigative journalist Jameson Rook, and their quest for the old spy and the motive behind the past murder unearths an alarming terror plot—which is anything but ancient history. It is lethal. It is now. And it has already entered its countdown phase. Complicating Heat's mission to bring the rogue spy to justice and thwart the looming terror event, a serial killer begins menacing the Twentieth Precinct and her homicide squad is under pressure to stop him, and soon. The frightening murderer, known for his chilling stealth, not only has singled out Nikki as the exclusive recipient of his taunting messages, he then boldly names his next victim: Detective Heat.