On July 26, 1974, after a long day of visiting friends at a dune shack in Provincetown, Massachusetts, 12-year-old Leslie Metcalfe hiked along the beach with her parents. Their friends’ dog was following them when he caught a scent he couldn’t say ‘no’ to. He ran off barking, stopping to sniff something in the dunes. When Leslie caught up to the dog, she discovered something that would haunt investigators for 47-years and counting: the decomposing body of a woman. This is the murder mystery of the Lady of the Dunes.