Sarapee and Pun inherit a beach mansion from Luang Narubal, the husband and benefactor whom they betrayed and left to die in sorrow. The two now decide to move in and turn the mansion into a hotel in order to make some money. Twenty five years pass. Sarapee has died. Her two children from her marriage to Pun, Parinya and Patama, are now fully grown and they return from living abroad to take over the hotel. After renovating it, the mystery begins. Deaths occur over and over again, and sometimes Parinya and Pattama witness them. It isn't long before they are the only two people left to uncover the mystery and fight to stay alive. But who is the mysterious murderer?