When they were fifteen, Willa, Luz, and Britton's friendship was everything. When they were sixteen, they stood by each other no matter what. When they were seventeen, they went through the worst. And when they were eighteen, Willa ruined it all. Now, it's the week of graduation, and Willa is left with only a memory box filled with symbols of the friendship she destroyed: A book of pranks. Corsages from a nightmarish homecoming. A greasy pizza menu....