Mae Bia (2015)

"In the heat of passion, a woman hides a poisonous secret."

Chanachol, recently returned to Thailand after living overseas, signs up for a tour to get back in touch with Thai culture, and finds himself attracted to the tour guide, Mekhala. There are several problems with the relationship: Chanachol is married, with family, and Mekhala has a mysterious, symbiotic relationship with a deadly cobra, and many of her previous suitors have ended up dead.