When she stood to leave, there was one last object at the pier's end, small and heavy in her palm. It was a brass key tied to a threadbare ribbon, engraved with a single letter: U. No lock in Union Bay fit that key; it was old, its ridges worn down by hands that had used it often. The ribbon smelled faintly of tar and smoke and something sweet — lemon, maybe — a scent she couldn't place but found familiar enough to claw at the edges of memory.