When Sophie receives a parcel from her best friend, Freya, she expects it to contain the reasons why Freya left town so suddenly, without explanation or even a goodbye. Instead, she finds a letter addressed to Win, a girl Freya barely knew - or so Sophie thought. As more letters are unveiled and addressed to more people on the periphery of Freya's life, Sophie and Win start to piece together who Freya truly was and why she left. Sometimes it's not about who's gone but about who they leave behind.