It's Bangkok Fable, the next project by Fireball director Thanakorn Pongsuwan.
Here's the synopsis:
Anek is the last remaining descendent of the Brahmin priesthood. However, he rejected the heritage of the ancient bloodline to become a normal husband and father in present day Bangkok. Out of the blue, a rich woman called Krittiya asks for his help to break a curse that has returned from the distant past. All the women in her family, including the children, are becoming physically deformed. To protect his own family, Anek returns to his childhood home and learns that two hundred years ago a young woman swore revenge on Krittiya's ancestors. His great-great-grandfather sealed the woman's angry spirit in a secret tomb. Anake must solve the puzzles that lead to her resting place in the maze of modern Bangkok, encountering evil spirits and other secrets that had best stay buried.
Hopefully it will be another showcase of Bangkok's gritty underbelly, which Thanakorn has portrayed pretty well in his Muay Thai-basketball combat drama Fireball and his first film, the romantic drama Fake. That's blended with the supernatural, like his thriller Opapatika (Demon Warrior).
Co-writen by Thanakorn, Suthiporn Tabtim and Siwaporn Pongsuwan, it's being produced by Bangkok Film Studio's Sa-ngar Chatchairungruang, and is listed as being "in production" by the Film Catalogue.