While trapped in the horrid environment of Number 12 Grimmauld Place, Sirius Black faces the torment of his mother. Isolated in his room, his only joy is the letters he receives from friends-especially one Remus Lupin. Through heartfelt letters and one gift of music, we see these two figure out that maybe there's more than just friendship on the line. Join the Marauders in the summer of their sixth year, a story told by Sirius Black to someone very special to his heart.