When they find a magic pool in the Forbidden Forest, it kicks off an unlikely friendship for two lonely girls thirty years apart of each other. Hermione begins a desperate search to find a way to save her new friend from the fate she knows awaits her, all the while dealing with the severe repercussions of having lived through a war. It becomes the start of an unexpected adventure.

On a Hogsmeade trip in her 6th year, Hermione finds Bellatrix Lestrange wounded with parts of her memory missing. The trio keep her in the room of requirement while she heals and Hermione soon realizes that without the memories of her trauma, Bellatrix, her first real intellectual match, has a chance to start over. Meanwhile, Voldemort searches for his most faithful. Bellamione.