A global eerie calamity strikes suddenly, and the dormitory building falls into an enclosed strange realm, where all kinds of malevolent anomalies run rampant deep into the night, and people perish one after another. Han Beita unexpectedly awakens the power to slay anomalies and kills the first one with his own hands in his dorm room. Facing the desperate teachers and students in the building, he steps forward to unite everyone, draws defensive lines, and teaches them how to fight back against the anomalies. With people losing heart and constant internal and external crises, Han Beita leads his roommates and all residents of the dormitory to fight together and stand their ground. They build a defensive line by New Year and fight their way toward a glimmer of survival in a dormitory brimming with mortal danger.