Year: 1888. Diminutive sixteen-year-old Auggie Rose decides he can no longer take the physical and mental abuse at the hands of other boys living at the orphanage. He decides to leave and cast his lot living as a recluse on the nearby beautiful Presque Isle, a peninsula on the shores of Lake Erie. After sneaking out in the middle of the night, on his way to the peninsula, he witnesses a murder at the hands of 'the man with a limp'.

The murderer initially does not know he was witnessed. Not knowing what else to do that wouldn't jeopardize him being sent back to the orphanage, Auggie tries as best he can to put the incident out of his head and so begins his new life adjusting to the wilds of Presque Isle. To that end, Auggie is helped along by Joe Root, a hermit himself and a curiosity among the locals, who has been living on the beaches of Presque Isle for decades. He is also befriended by kitchen help, Maisy, who works at a resort at the entrance to the peninsula. Over time, his relationship with Maisy blossoms into more than just friendship as he adjusts to his new life.

During this time, he also slowly begins to realize that the murder he had witnessed is part of a larger plan that has something to do with the peninsula itself. Auggie inadvertently inserts himself into the investigation and is befriended by Will Weston, the detective investigating the murder. As businesses around Presque Isle are being bought then shuttered by a mysterious businessman, one of these owners is murdered. It is then that Auggie begins to realize that whatever nefarious plan 'the man with the limp' has, it is putting his life and the lives of those closest to him in mortal danger.