When two hikers go missing within a series of daunting caves outside of Denver, Colorado, FDLE special agent Amy Larson and her partner, FBI special agent Hunter Forrest, have good reason to suspect foul play. The pair of hikers are only the latest to vanish after a rash of disappearances that’s left local law enforcement stumped. But in searching the dank caverns near the Arkansas River, the agents aren’t prepared for the horror they uncover: a muddy pit littered with corpses. Covered in bite marks. Made by human teeth.

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.

Devon Mayes thought she was done with the small conservative town she once called home. She fled when she was eighteen after her best friend Summer took her own life, leaving Summer’s twin brother, Keaton, lost in his grief. But when tragedy strikes again, Devon has nowhere to turn but back to the place that first broke her heart. Being back in Arkana means struggling with the old guilt that shrouds her bisexuality and her feelings for Keaton. There’s so much she’s still hiding from him—and so much of their shared past that’s now resurfacing.

Gemma Guillory has lived in the Australian Outback enclave of Rainier her entire life. She knows the tiny, red-dust town’s ins and outs by heart, knows the people like they are her family, their quirks as if they were her own. She also knows her once charming town is now remembered for one reason and one reason only: three innocent people died there at the hands of a serial killer. The last stop on the Rainier Ripper’s trail of deaths fifteen years ago was her picturesque little tea shop.