Rose Mansion S01E01 - Episode 1

Ji Na, who left her family and is living as a hotelier in Busan, receives a phone call from her father saying that her sister has not been contacted for several days. Using her vacation, she goes up to Seoul to find her older sister Ji Hyeon, who is not in regular contact with her. When she arrives on the balcony of her apartment, she finds a shocking figure. (Source: Namu Wiki)