In the small town of Stillwater, on a warm October night in 2019, Luna receives an email from a woman named Margot who asks her to delete a story she wrote ten years ago. Luna doesn't know Margot, doesn't remember the story, doesn't even remember writing it. But Margot insists, and the details she provides are chillingly specific. As Luna digs through old files, she begins to piece together a memory she thought she'd buried, one that involves a lake, a cabin, and a promise she made to a girl who was never really there. A story about the things we write when we're young, the things we forget on purpose, and the emails that arrive too late.