Harry Potter and the Dark Secret

[Canon/OC] Three years after Hogwarts, aurors Harry and Ron learn of the existence of Gerald Davis, son of Gellert Grindelwald and pupil of Tom Riddle, from MACUSA when the American wizard flees to Britain. Gerald presents as innocent, but as they delve deeper into the ageless wizard with unusual magical prowess, the aurors begin to doubt everything about the strange man...