A new night guard begins their shift at the antique museum, discovering a strange rulebook filled with odd survival instructions instead of typical security protocols. The rules warn that duty is only from midnight to six a.m., forbidding daytime entry, and describe eerie signs such as moving eyes on a tricolor guardian beast statue, crying sounds from a bleeding jade hairpin, and a headless bronze warrior demanding a head replacement. When they hear an unexplained presence, the guard realizes these bizarre warnings are real, setting a tense and mysterious tone for the night ahead.