Snape was on a night patrol in the corridors of Hogwarts Castle when he suddenly felt a stinging sensation on the skin of his left forearm where the Dark Mark was located. His expression shifted abruptly, and he hurried into a corner, unbuttoning his left sleeve and rolling it up.
The Dark Mark was turning red and throbbing with pain—the Dark Lord was summoning him.
Yet, according to the timeline of the future, the Dark Lord should not have begun summoning him this soon.
Chapter 123