In May of 1941, a group of young army volunteers is recruited in Chumpon south of Bangkok. Many high-school students apply to join the group. When the Japanese army lands at Chumpon in December, they bravely fight against the army. The film is based on the true story of how young army volunteers fought to defend their country from the Japanese Army. A misunderstanding between the two nations caused the unnecessary war to break out.

Sarapee and Pun inherit a beach mansion from Luang Narubal, the husband and benefactor 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 is has already died. Her two children from her marriage to Pun, Parinya and Patama, are now grown-ups and return from abroad to look after 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 the only two people left to uncover the mystery and fight to stay alive. Who is this mysterious murderer?