summary from
https://en.wikipedia.org/wiki/Poot_Mae_Nam_Khong
Every river has its own soul as vengeance never dies.
Dr. Akkanee and his crew travels to a village that is old fashion and superstitious to study the paranormal and that prove that it is not true. In the village he meets and falls for a girl named Bunpaun. He is curious about her since he often dreams about her before coming to the village. The village is close to the
Mekong river, which the villagers believe house spirits and deities. This is true as a
spirit of a vengeful princess resides underneath the river waiting for her betrothal, which is the reincarnated Dr. Akkanee.
In a previous life, Dr. Akkanee traveled from his land to marry the princess. The princess is taken with him when they first meet and immediately falls in love with him. Dr. Akkanee tells her that he wants to become a monk for a short while to dedicate his life to prayer and
contemplation. The princess compromises and agrees to postpone the wedding. One day she goes to his room to bring him snacks and catches him with her younger sister, who she is very close too and the reincarnated Bunpaun, in an innocent yet intimate moment. It was obvious that the two were seeing each other behind her back. In rage, princess cursed them both and vows revenge for their betrayal. The hatred she had for the two caused her to lose her beauty and become a vicious spirit that plagues the village.
In the present time, Bunpaun finds an enormous egg at the bank of
Mekong river and is compelled to eat. When she ate it, it turned her into a vessal, possessed by the princess now queen (or the Mother) of Mekong river who had long lusted for revenge. After the possession, Bunpaun disappeared from the village. When she returned, carrying the dreadful spirit inside her, the evil queen began killing local young girls one by one in order sustain her power. No exorcist got rid of her, no technology destroyed her, only the true love of Bunpaun and Dr. Ake was able to break into her vengeful heart......
I thought the four of them looked too close to be just a group of friends who hangs out with each other. From lakorn to real life! 