Mattheo Riddle returns to Riddle Manor after his first year at Hogwarts, bringing his new best friend Theodore Nott with him for the summer, where Theo meets Mattheo’s younger sister for the first time. At ten years old, she has spent the past year hearing about Theo through Mattheo’s stories and letters, and meeting him sparks a quiet, immediate crush that she keeps mostly to herself as she starts watching him from a distance that first summer. From then on, Theo returns to the manor every year, and the three of them grow up side by side, their childhood familiarity slowly turning into something deeper and harder to define as time passes. What begins with a single summer meeting gradually unfolds into a story of growing up together and a bond that shifts over the years, as Theo starts to see her in a way he never did before, just as she tries to convince herself she has already moved on.