Poppy wants to go to college like everyone else, but her father has other ideas. Ever since her mirror twin sister, Lola, mysteriously vanished, Poppy s father has been depressed and forces her to stick around. She hopes she can convince Lola to come home, by sending her twin a series of eighteen letters, one for each year of their lives. When not excavating childhood memories, Poppy is sneaking away with her girlfriend Juniper, the only person who understands her. But negotiating the complexities of queer love and childhood trauma are anything but simple.