2024: Almost forty years ago, marine biologist Gillian Taylor stormed away from her dream job at Sausalito's Cetacean Institute, and was never seen or heard from again. Now a new true crime podcast has reopened that cold case, but investigator Melinda Silver has no idea that her search for the truth about Gillian's disappearance will ultimately stretch across time and space, and attract the attention of a ruthless obsessive with his own secret agenda....