All Alexis Harding ever wanted was to explore the world. She never realized that she would also lose the only boy she's ever loved in the process. A year after things ended with Hayden Daugherty, Alexis begins writing letters to him when she realizes that she's never moved on, as part of an experiment of course. In a story full of nostalgia, throwbacks, playlists, and love letters, follow Alexis as she tries to make sense of the way the love of her life became nothing but a distant memory.