Cette série suit deux femmes redoutables qui affrontent les ténèbres qui se cachent dans la société. L'une est une consultante en sécurité indépendante spécialisée dans les traqueurs, tandis que l'autre est une agent spécial du FBI. Ensemble, elles parcourent les rues sombres de Los Angeles, combattant le crime et protégeant les innocents. Leur détermination et leurs méthodes contrastées forgent un partenariat d'enquête captivant.
Working alone, Abby Sinclair hunts stalkers, infiltrating their lives, uncovering their dark desires, and bringing them down, and her new prey is her next-door neighbor, Raymond Hickle, whose twisted obsession with a beautiful TV news anchor is about to explode.
Three years after the serial killer Mobius murdered FBI agent Tess McCullum's lover, he resurfaces in Los Angeles with a chemical nerve weapon that could kill thousands, and Tess is determined to do whatever it takes to stop him.
Tess McCallum, a skilled FBI agent, is reluctantly paired with a new partner while pursuing a ruthless kidnapper known as the "Rain Man." This criminal traps victims in Los Angeles' storm drain system, demanding ransom payments from the city. Meanwhile, Abby Sinclair, a freelance security expert with a knack for unconventional methods, is also on the case, aiding a potential target who distrusts law enforcement. As a rainstorm looms and time runs out, the duo must collaborate to unravel the mystery and save lives in a gripping tale filled with suspense and unexpected twists.