Lulu Mayfield has spent the last five years molding herself into the perfect 1950s housewife. Despite the tragic memories that haunt her and the weight of exhausting expectations, she keeps her husband happy, her household running, and her gelatin salads the talk of the neighborhood. But after she gives birth to her second child, Lulu's carefully crafted life begins to unravel.

Dan Garvie’s life has been haunted by the crime he witnessed as a child—narrowly escaping an encounter with a notorious serial killer. He has dedicated his life since to becoming a criminal profiler, eager to seek justice for innocent victims. So when his father passes away under suspicious circumstances, Dan revisits his small island community, determined to uncover the truth about his death. Is it possible that the monster he remembers from his childhood nightmares has returned after all these years?