According to a post on japancinema.net:
Not a boring Buddhist thriller, Saranyoo Jiralak’s debut feature 9 Wat starts off with a bang. It tells the story of a man named Nat whose quest is to correct his entire past mistakes in exactly seven days by visiting 9 temples. In 9 Wat three people are more or less willingly going on that journey to do good and return home cleansed and with a pure heart and mind. All three characters have different purposes for taking this trip. But later they discover that they were put together on this trip for an unforeseeable reason.
Write a story about characters who go on a journey together for a purpose which becomes evident toward the end of their journey.