Four bodies have been discovered along Europe’s riverbanks, placed with care—and completely drained of blood. Pinpricks on their throats indicate a slender murder weapon, but DNA found in the wounds suggests something far more sinister. Tasked with investigating, the FBI recruits Agents Della Hamilton and Mason Carter to Blackbird, an international offshoot of the Krewe of Hunters. If you want to catch a vampire killer, you need agents who can speak with the dead.

Deep in the Florida Everglades, the body of a woman is discovered in pieces, presumably ravaged by an alligator. Upon closer inspection, it’s determined no animal could make such perfectly precise cuts. Only a blade could do that. Wielded by a human. Soon, dozens of oil drums emerge amid the river of grass. Each one packed to the brim with body parts.

In the unbearable heat of another sultry Washington, D.C., summer, a serial killer is on the loose. Dr. Tess Court, one of the capital’s most successful psychiatrists, wants nothing to do with the case—until the police convince her to lend a hand to the lead investigator, legendary ladies’ man Detective Ben Paris. Scarred by his family’s history, Ben has even less use for shrinks than Tess has for him—but the forces of animal magnetism and a shared desire to catch the demented criminal known as “The Priest” inexorably erode the walls they’ve built.

Leo has two priorities: putting down new roots and making up for his mistakes. He doesn't have time for a blind date with his new neighbor. Until he finds out she's the woman he let slip away… but never forgot. Cassie has finally paid her debts and is living the life she's always wanted. Her new neighbor sounds like he could be Mr. Right. Only, he turns out to be the man who promised her the world, then disappeared without a trace. In another time and another place, he was a playboy who made her believe in miracles. Now, he's a danger to everything she's worked hard for.

When FBI special agent Luke Kendrick discovers chilling evidence of dozens of victims at a crime scene in London, he recognizes the calling card of the notorious H. H. Holmes Society. Named for the eighteenth-century monster regarded as America’s first serial killer, the society is comprised of a twisted web of killers, working to carry out heinous murders in Holmes’s memory. And now the group’s been linked to a Scottish castle turned B and B—where guests check in but never check out.

A ritualistic murder on the side of a remote road brings in the Florida state police. Special Agent Amy Larson has never seen worse, and there are indications that this killing could be just the beginning. The crime draws the attention of the FBI in the form of Special Agent Hunter Forrest, a man with insider knowledge of how violent cults operate, and a man who might never be able to escape his own past.

When Special Agent Jeanette LaFarge is called in to investigate a vineyard in the Reims region of France, the last thing she expects to find is multiple bodies with every vein bled dry. It’s yet another case tailor-made for Blackbird. Joining her is recent recruit Detective Daniel Murray, eager to use his newfound abilities to track down whoever is terrorizing Paris and its surrounding areas. With each ashen victim grows the realization that those responsible weren’t inspired by vampiric creatures of the night but by Elizabeth Báthory herself.

A secret government unit is formed under the oversight of Adam Harrison, famed paranormal investigator. The case: In a historic mansion in New Orleans’ French Quarter, a senator’s wife falls to her death from a balcony. Most think she jumped, distraught over the loss of her young son. Some say she was pushed. And yet others believe she was beckoned by the ghostly spirits that inhabit the house - once the site of a serial killer’s grisly work.

On a weekend vacation, Beth Anderson is unnerved when a stroll on the beach reveals what appears to be a skull. When a stranger approaches, Beth panics and covers the evidence. But when she later returns to the beach, the skull is gone. Beth digs deeper into the mystery of the skull, and everywhere she goes, Keith Henson, the stranger from the beach, seems to appear. A body washes ashore, and Beth begins to think she needs more help than she bargained for.

Scotland has a dead body problem. Another one. And in the wake of a similar spate of tribute killings, Special Agents Luke Kendrick and Carly MacDonald know they have their work cut out for them. Working alongside a new team of agents, the partners have more questions than answers when the crime scenes yield little evidence. In the style of infamous killers Burke and Hare, it appears victims are being moved to a secondary location, where they’re dissected and sold for spare parts.

Newly promoted detective Kate Morgan stands up for the victims in the world, never backing down or giving up. From a family of victims, Kate will not tolerate those who take advantage of others. The worst ones prey on the hopes of desperate people to line their own pockets. And, when Kate finds a connection between more than a half-dozen cold cases to a recent case - where a child's life is in jeopardy - she'll make a deal with the devil himself to protect the child.

Much to their mutual annoyance, FBI agent Jacob Wolff and Miami detective Jasmine Adair discover they’re both undercover to bust a notorious organized crime group. But amid a glamorous South Beach nightclub opening, their key informant is found dead, leaving Jacob and Jasmine the dangerous job of infiltrating the ring. With desire igniting between them, can the two set aside their distrust and work together to bring down the brutal mobsters?

Everyone in the small town of Denton is searching for Isabelle Coleman, a missing 17-year-old girl. All they've found so far is her phone and another girl they didn't even know was missing. Mute and completely unresponsive to the world around her, it's clear this mysterious girl has been damaged beyond repair. All Detective Josie Quinn can get from her is a name: Ramona. Currently suspended from the force for misconduct, Josie takes matters into her own hands as the name leads her to evidence linking the two girls.

Samantha Blair hides her psychic abilities and lives on the fringes of society. Sam knows she must go to the authorities, but will the rugged no-nonsense detective in charge of tracking down the killer believe her?

Eve St. Clair desperately needs help sorting reality from her fearful imaginings when ghostly voices seem to haunt the Victorian house in Sunderland, England, that she inherited from her uncle. Online research leads to a group that claims to offer just the aid she’s seeking. But can Ransom King’s handpicked team of investigators truly banish Eve’s night terrors?