The film — called Lahn-Mah in Thai, or Grandma's Grandchild — is about a university dropout, M, who quits his job to spend time with his Chinese-Thai grandmother, Amah, after finding out she has terminal cancer.
Realising M is simply trying to secure Amah's inheritance, the rest of the family swoop in to stake their claim.
It's been a record-setting blockbuster not only in Thailand but across South-East Asia, with box office takings of at least $40 million and a total audience of more than 10 million.
The family relationships and characters have resonated so much with audiences it even inspired a TikTok meme with film goers posting clips of themselves before watching it and tear-streaked and sobbing afterwards. Review from elsewhere