"Claire’s grown up triple-checking locks. Counting her steps. Second-guessing every decision. It’s just how she’s wired—her worst-case scenarios never actually come true. Until she arrives at an off-the-grid summer camp to find a blackened, burned husk instead of a lodge—and no survivors, except her and two other late arrivals: Reyva and Mariana. When the three girls find a dead body in the woods, they realize none of this is an accident....

"On the evening of their engagement party, Maine Game Warden Investigator Mike Bowditch and Stacey Stevens witness what seems to be a hit-and-run speedboat crash on a darkened lake. When they arrive at the scene, their spotlight reveals a gruesome sight: a severed arm floating just beneath the surface. As day breaks, the warden dive team recovers not one but two naked corpses: a dismembered man and the married woman with whom he was having an affair....