Lek, a Thai boxing instructor teaches Thai boxing to a group of kids for their self-defence. He is like both teacher and father to the kids – Wuth, Catt, Pong and Jib. The four have to look after Wuth’s little brother, Woon who has a heart problem. Soon, they came across a twist of fate that leads them to fight a gang of hooligans. This causes a sudden heart attack to Woon, resulting him to have a heart transplant immediately. Unfortunately, the hospital they were in has been seized by an international terrorist group led by Paeda. Unavoidably, they get involved and fight against the terrorists, as they need to save Woon’s life and help their country at the same time.

Gentle giant Barney Emerald is drugged and robbed while on holiday in Pattaya. He befriends two Thai siblings, one of which is a muay-thai kick-boxing champion, and stays with them until he can recover his passport. Unfortunately the hunt for his passport makes him cross ways with international gangsters. But Barney has found a secret weapon, the very spicy Thai salad “Somtum”.