Pojaman the Legacy

The horrifying and bloody horror story of Pojaman Sawang Ka Ta begins when Pojaman, a lovely, well-mannered young woman, travels from her home in the sticks to Bangkok to study. Before he died, her father ordered Pojaman to live in the Baan Dok Mai Thong mansion. Pojaman walks into a madhouse where she soon comes to find her life is in danger. The household schemes to assassinate her in order to prevent her from inheriting. When at every turn, the plans keep failing, fate intervenes in an unexpected way.
(Source: IMDb, Letterboxd, Nangdee.com)