The day my sister was swallowed up by the red light, I was three minutes late. Three years later, I was dragged into the hell of rules - die by following the rules and live by violating them. Living shadows, reflections kill people, vocal cords are stripped off, and the first 16 people are all dead. Until I tore open the heart of the giant beast and discovered that my sister had never been trapped: she took the initiative to sacrifice three years of obsession to suppress the inner demons for me. The rules have been imposed on the world. Night Watchman No. 17, It is me who will protect her.
