When Simon is kidnapped by the Fey, he's amazed to find a friend in former Shadowhunter Mark Blackthorn. One of 10 adventures in Tales from the Shadowhunter Academy.
After Simon is kidnapped by faeries (why is he always kidnapped?), he uncovers rumors of a secret weapon Sebastian left behind for the faerie queen. He must escape the Fey, relying on his only ally, former Shadowhunter and Dark Artifices character Mark Blackthorn.