In the 1980s and ’90s, a deeply disturbed man from New Jersey drifted from town to town, hiding behind a soft-spoken voice and a childlike demeanor. Seemingly tormented by delusions, and obsessed with revenge, he harbored gruesome secrets. By the time investigators connected him to the 1986 disappearance of six-year-old Michele Dorr, and later, the baffling vanishing of Harvard graduate Laura Houghteling, it was clear: this man wasn’t just strange... He was deadly. And he may have left behind more victims than anyone ever realized. This is the story of Hadden Clark, also known, as the Cannibal Gardener.

In July of 1986, a 19-year-old man was found hanging from a tree near his Maryland home. Authorities swiftly ruled it a suicide, but those closest to him questioned everything about the scene; from the small tree, which could barely support his weight, to the lack of an autopsy, to the suspicious friends who seemed to vanish in the wake of his sudden death. Years later, his mother received a suspicious envelope on her doorstep, and new evidence would challenge the original ruling. This is the death of Keith Warren.

In July of 1995, a 24-year-old woman in Alaska headed out on a date with a man she had only recently met. She was last seen at a crowded summer fair in the forest, surrounded by tourists - but by the time the sun rose the next morning, she was gone. What followed was a desperate search in the unforgiving Alaska wilderness, and eerie silence from her date, which only deepened the mystery. This is the disappearance of Erin Gilbert.