Deze serie volgt twee formidabele vrouwen die de duisternis bestrijden die in de samenleving loert. De ene is een freelance beveiligingsconsultant gespecialiseerd in stalkers, terwijl de andere een speciale FBI-agent is. Samen navigeren ze door de rauwe straten van Los Angeles, bestrijden ze misdaad en beschermen ze de onschuldigen. Hun vastberadenheid en contrasterende methoden smeden een boeiend onderzoekspartnerschap.
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.