The story starts with the next generation of the original Boonchu films. Boonchu and Molee send their son to Bangkok. How's Boonchoke going to handle the unexpected situation in the big city?
Boonchoke failed an entrance exam last year, but this year he makes it through into the medical school of a famous university in the north of Thailand. But the medicine he's studying is not the modern one, it's traditional herbal medicine. Boonchoke's parents, Boonchu and Molee, agree to let their only son go live in Chiang Rai for his study.
Boonchu and Molee are getting married. But they both have a special task to accomplish as to prove their true love to Manee, Molee's sister. They have to rebuild their newlywed home and to help clean the polluted canal attached to the home. Of course, the mission could not leave alone all his friends to join him and Molee win this game.
