Sarapee and Pun come into possession of a seaside mansion left to them by Luang Narubal, the husband and benefactor they deceived and abandoned, leaving him to die in despair. The pair decides to move into the mansion and convert it into a hotel to generate income. Fast forward twenty-five years, Sarapee has passed away. Her children with Pun, Parinya and Patama, have grown up and returned from overseas to manage the hotel. After they refurbish the property, strange events unfold. A series of deaths occur repeatedly, with Parinya and Patama occasionally witnessing them. Soon, they find themselves as the last ones standing, tasked with solving the mystery and fighting for their survival. Who is behind these mysterious killings?