Luna takes us to Ontonagon, Michigan, in the autumn of 1997, where a retired lighthouse keeper named Elwood Stillman told her about the winter his father saw the pier walk. Not collapse in a storm, not crack under ice—but step forward, one stone at a time, into the lake. Elwood's father had kept watch at the Ontonagon Pierhead Light for thirty years, and he'd seen things no one spoke about. The year was 1953. The temperature dropped to forty below. And one night, the lighthouse beam swept across the pier and caught it mid-stride—a slab of concrete curling like a wave, then settling back. The Coast Guard called it frost heave. But the pier kept moving, farther each winter, until one spring it was gone entirely. Elwood showed Luna the old photograph, a grainy black and white of an empty stretch of water where the pier used to be. He never told anyone else, he said, because the truth was too simple and too terrible: the lake wanted the pier back, and it took it.