No one could understand why Colin and Roy were best friends. Colin was so shy; Roy was so popular. Colin was fascinated by Roy - and Roy was fascinated by death. Then one day, Roy asked his timid friend: “You ever killed anything?” From that moment on, the two were bound together in a game too terrifying to imagine - and too irresistible to stop.

A decade ago, Emily Carlino vanished after her car broke down on a California highway. She was presumed to be one of serial killer Ronny Lee Jessup’s victims whose remains were never found. Writer David Thorne still hasn’t recovered from losing the love of his life, or from the guilt of not being there to save her. Then David meets Maddison Sutton, beguiling, playful, and keenly aware of all David has lost. But what really takes his breath away is that everything about Maddison, down to her kisses, is just like Emily.

They found the town silent, apparently abandoned. Then they found the first body strangely swollen and still warm. One hundred fifty were dead, 350 missing. But the terror had only begun in the tiny mountain town of Snowfield, California.

They were madly in love. The perfect couple. That was the story everyone in South River believed...until Gin Talcott and Adam Archer are found shot in their bed. Adam is dead at the scene. Gin is fighting for her life. Detectives Greta Jessup and Finn Pate are assigned to the case. Greta has a long history with Gin’s first husband, Eddie, and is determined to protect his 18-year-old twins. Piper discovered the bodies. Daniel is missing—and so is Adam’s gun.

In picturesque Moonlight Cove, California, inexplicable deaths occur, and spine-tingling terror descends to this "edge of paradise". Growing numbers of residents harbor a secret so dark it is sure to cost even more lives.