Zen, an autistic teenage girl with powerful martial arts skills, gets money to pay for her sick mother Zin's treatment by seeking out all the people who owe Zin money and making them pay.
Kham finds himself in trouble when he is accused of killing a trader. While on the run from the trader's nieces who are martial artists, Kham meets a friend who warns him of a terrorist plot.
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.
