After waking up, Eli Vaughn finds himself a low-level spy planted in Hogwarts by the Death Eaters, bound by an Unbreakable Vow: reveal his true allegiance to anyone, and he'll be reduced to ashes on the spot.
His superiors treat him as expendable, ready to cut him loose at any moment. His fellow Death Eaters watch him, waiting for a chance to catch him slipping. The Dark Mark burns beneath his skin, and every day he pretends to be a good person brings him one step closer to death.
Eli just wants to survive. If he can't defect, then he'll climb the ranks on his own. Feed them false intelligence, turn on his fellow Death Eaters, and grow a new face in the darkness each time, turning every sacrifice into a stepping stone.
The whole school thinks he's the quietest, most harmless Slytherin. Only Eli knows that beneath the mask lies a spy network ready to explode at any moment.
Until one day, the headmaster asks him from across the Great Hall, “What have you been reading lately?”
He looks up. At last, someone has caught the stone.
“This borrows the setting of Harry Potter, but doesn't tamper with Harry's storyline. No poison, so enjoy without worry.”