Neulbom Garden

After moving to Neulbom Garden, the only inheritance of her husband, So-Hee begins to have nightmares. She discovers a photo of a mysterious female student in the mansion, and after that, the people she meets lose their lives one after another and become suspects in murder cases. What kind of case will So-Hee have to solve in Neulbom Garden? (Source: Naver, translated)