It starts with a body, a young woman found dead - torn to bits - in an Iowa cornfield on one of the few family farms still managing to compete with the giants of Big Agriculture. When Sergeant Riley Fisher, newly promoted to head of investigations for the Black Hawk County Sheriff’s Office, arrives on the scene, an already horrific crime becomes personal when she discovers the victim was a childhood friend, connected to a dark past she thought she’d left behind.

In scenic Granite Harbor, life has continued on—quiet and serene—for decades. That is until a local teenager is found brutally murdered in the Settlement, the town’s historic archaeological site. Alex Brangwen, adjusting to life as a single father with a failed career as a novelist, is the town’s sole detective. This is his first murder case and, as both a parent and detective, Alex knows the people of Granite Harbor are looking to him to catch the killer and temper the fear that has descended over the town.

Ten years ago, fifteen-year-old Scarlett Crosby was held captive in a terrifying ordeal with a girl named Della. Scarlett escaped, their predator was killed, and Della simply vanished. Detective Kevin Dawson always wondered if Della even existed. A decade later, Scarlett is a successful artist. As hard as she tries to move on, the mysterious Della remains her inescapable obsession. Then a girl’s body is discovered—a link to Scarlett’s horrific past—and all her old traumas resurface. So does Della.

1994: When Gardas Julia Harte and Adrian Clancy are called out to a sleepy housing estate in Cork to investigate a noise complaint, they are entirely unprepared for what they find. What happens next will haunt Julia for the rest of her career, leaving her plagued with nightmares and terrified of the dark. There is a serial killer at work in Cork, one as clever as he is deadly. Julia may not be a detective yet, but after the harrowing events of that night, she is determined to be the one to catch him…

There’s something sinister under the surface of Wesley Falls, and it’s not just the abandoned coal mine that lies beneath it. The summer of 1995 kicks off with a party in the mine where six high school students witness a horrifying crime that changes the course of their lives. When they realize that they can’t trust anyone but each other, they begin to investigate what happened on their own. As tensions escalate in town to a breaking point, the six make a vow of silence, bury all their evidence, and promise to never contact each other again. Their plan works—almost.