COLD COMFORT - The woman who spies

COLD COMFORT - The Woman Who Spies (HP, AU, SSHG) -
The woman who spies / Original title: Mundus contritum and A lány, aki kémkedik

Grindelwald.
"Anyone who hears this name shivers from fear, and instantly blood-filled images appear before his eyes. Thousands of dead people who have been tortured innocently and destroyed. "
Hermione Grindelwald, while trying to survive her father's madness, is becoming more and more involved in his affairs while she realizes that she is one of his men and even one of the best. One day her dad gave to her one of the most decisive missions of his life; he has to enter to the Hogwarts walls and spies from there.
Riddle / Hermione / Snape