Rose Mansion S01E02 - Episode 2

Ji Na and her father, Hyung Sik, find a mannequin hanging by the neck and bloodstains on the balcony of their house. Thinking it has something to do with Ji Hyeon's disappearance, they report it to the police and meet detective Min Soo for help. Back home, Sook Ja, head of the Women's Council at their apartment complex, tells Ji Na about a quarrel between her older sister Ji Hyeon and ex-convict Woo Hyuk, causing Ji Na to suspect Woo Hyuk. (Source: Namu Wiki, MyDramaList)