In West Akron, Ohio, there lived a reclusive elderly man who always wore mittens, even in July. He had no friends and no family; all over town, he was known as the Man from Primrose Lane. And on a summer day, someone murdered him. Fast-forward four years. David Neff, the bestselling author of a true-crime book about an Ohio serial killer, is a broken man after his wife's inexplicable suicide. When an unexpected visit from an old friend introduces him to the strange mystery of "the man with a thousand mittens," David decides to investigate. What he finds draws him back into a world he thought he had left behind forever. And the closer David gets to uncovering the true identity of the Man from Primrose Lane, the more he begins to understand the dangerous power of his own obsessions and how they may be connected to the deaths of both the old hermit and his beloved wife.