Philip Russell, a US Park Ranger for a small island in the Pacific Northwest, has stumbled across a dead body in the forest. Unsure if the dead woman is a local or someone from the mainland, the new female sheriff has come to Rockfish Island to find out if the community has anything still to fear. Eager to help solve the mystery, both instantly find themselves at odds with each other. Philip, defending the people he's known his whole life, and Sheriff Lane, giving no one the benefit of the doubt...not even Philip.

Katie Benard reluctantly returns home to Grady Lake two decades after her older sister Malorie disappeared without a trace, a story that has captivated the nation since the day she was reported missing in 2003. After leaving home years ago, Katie is overjoyed to reunite with her childhood best friend and cousin while working at her family's lakeside resort at the end of tourist season in northern Michigan. Just when life begins to feel normal again, a teenage girl goes missing from the resort. She has vanished without a trace, just like Malorie.

While studying wolverines on a wildlife sanctuary in Montana, biologist Alex Carter is run off the road and threatened by locals determined to force her off the land. Undeterred in her mission to help save this threatened species, Alex tracks wolverines on foot and by cameras positioned in remote regions of the preserve. But when she reviews the photos, she discovers disturbing images of an animal of a different kind: a severely injured man seemingly lost and wandering in the wilds.

Heather Matthews, pregnant and in handcuffs, had an uncertain future ahead of her. Quinn Harstead, newly married and enjoying literary success, found out that someone very close to her held the answers to a mystery from decades before.

For over four decades, Camp Shady Oaks was the premiere youth camp for a summer filled with nature, survival skills, and fun in the remote woods of the Hiawatha National Forest. In 1999, it was forced to close abruptly when tragedy struck.