A killer is using labyrinthine storm drains to dispose of his victims, who are found handcuffed and drowned, washed out of the rain-filled drainage lines like garbage. The crimes compel FBI Agent Tess McCallum to crack the case, but they're touching a nerve in Personal Security Consultant Abby Sinclair. She fears it's the same madman who invaded her nightmares once before. As the two women work with each other to solve the case, tensions rise and tempers flare. And as sure as the rain, a new killing season begins.

When a vibrant young woman is found in bed by her hotshot businessman husband, carved from belly to throat with a very sharp knife, the elite Robbery-Homicide Division of the LAPD responds in full force. Best-case scenario for lead Detective Lena Gamble: Nikki Brant's husband killed her, case closed, and on to the next crime scene before the ravenous Hollywood media can get their lurid tabloid machinery up and running.

After years of paying her dues on the force, Beth Sturgis has earned her place as a detective for the Robbery-Homicide division of the Atlanta PD. Now, she's heading up a major manhunt for a potential serial killer who's working his way inward from the outskirts of the city. The copycat elements in the first crime scene lead Sturgis to retired FBI agent Jack Kale, who was responsible for apprehending and nearly killing the murderer known as the Scarecrow, the same Scarecrow who appears to be this new killer's terrible inspiration.

Carter's a homicide cop in Titanshade, an oil boomtown where 8-tracks are state of the art, disco rules the radio, and all the best sorcerers wear designer labels. It's also a metropolis teetering on the edge of disaster. As its oil reserves run dry, the city's future hangs on a possible investment from the reclusive amphibians known as Squibs. But now negotiations have been derailed by the horrific murder of a Squib diplomat. The pressure's never been higher to make a quick arrest, even as Carter's investigation leads him into conflict with the city's elite.

Ex-St. Paul cop Rushmore McKenzie has more time, and more money, than he knows what to do with. In fact, when he’s willing to admit it to himself (and he usually isn’t), Mac is downright bored. Until he decides to do a favor for a friend facing a family tragedy: Nine-year-old Stacy Carlson has been diagnosed with leukemia, and the only one with the matching bone marrow that can save her is her older sister, Jamie. Trouble is, Jamie ran away from home years ago.

At midnight, in a secret medical clinic in Washington, D.C., two foreign doctors and their team are completing plastic surgery on an anonymous client who is changing the appearance of his face, among other things. After the procedure, the client begins to stir - and suddenly the operating room erupts in violence, and the clinic is ablaze.

Seattle PD sex-crimes detective Livia Lone knows the monsters she hunts. Sold by her Thai parents along with her little sister, Nason; abused by the men who trafficked them; marooned in America...the only thing that kept Livia alive as a teenager was her determination to find Nason. Livia has never stopped looking. And she copes with her failure to protect her sister by doing everything she can to put predators in prison.

Just two years ago, the media turned Detective John Spader into a hero. He'd caught a twisted serial killer terrorizing Massachusetts, and the "Jack of Spades," as the media dubbed Spader, was born. But when the murderer walked free on a technicality - free to kill again - the public turned on Spader. Now a new serial killer is on the loose. He wears the silly, gap-toothed, grinning mask of Galaxo, Starboy Avenger! - a cartoon alien of unparalleled popularity with children.

When a local girl falls prey to a sadistic serial killer, Nashville homicide lieutenant Taylor Jackson and her lover, FBI profiler Dr. John Baldwin, find themselves in a joint investigation pursuing a vicious murderer. The Southern Strangler is slaughtering his way through the Southeast, leaving a gruesome memento at each crime scene – the prior victim’s severed hand.

For San Francisco’s newest medical examiner, Dr. Jessie Teska, it was supposed to be a fresh start. A new job in a new city. A way to escape her own dark past. Instead, she faces a chilling discovery when an opioid-overdose case contains hints of something more sinister. Jessie’s superiors urge her to close the case, but as more bodies land on her autopsy table, she uncovers a constellation of deaths that point to an elaborate plot involving drug dealers and Bitcoin brokers.