It’s a Friday night in late October, and the Slytherin Common Room is a haze of enchanted music and firewhisky. Mattheo Riddle—Theo’s primary enabler and the personification of "one more drink"—has dragged Theo into the thick of a party. Usually, Theo would be in the Ravenclaw or Gryffindor tower (wherever Erin resides) or tucked away in a quiet corner with her, but Erin is confined to her dorm with a brutal case of Dragon Pox-induced fever.