Tom Marvolo Riddle.
After graduating from Hogwarts, quits his job at Borgin & Burkes,
and mysteriously disappears.
1943, The year of the scandal:
House elf murders her own mistress,
Hepzibah Smith, descendant of the ancient Hufflepuff family.
Death by poisoning, cold case.
And yet
I'm still smelling dark magic here.
I promise Tom,
I, Grisha McLaggen, Heir of Gryffindor will stop you.