Geoul Sokeuro plot
"In the deep night, if you live alone, don't look in the mirror!"
Some mysterious murders have occurred at a department store, which has yet to reopen. Woo Yeong-min is an ex-police officer who now heads the department store's security. During the investigation, a woman named Lee Ji-hyeon appears. She claims that her sister, who died in a fire in the same spot, is the cause of the murders.