Lu Chu is the only blind person in this town. No one had ever exhibited such symptoms before him. Yet he has long grown accustomed to darkness and gossip, living a peaceful life with just his dog for company. Until one day, he sensed someone following him. Boldly, he invited the stalker named "7" into his home. From then on, his life seemed to unravel into an unsolved mystery. A suspicious stalker, an escape room, campus legends, life-and-death team battles... Survival and slaughter. Struggling and fighting, all for a slim chance at life.