YAU, is a patriotic Taoist priest. He becomes fugitive after assassinating a senior Kam mandarin. Tonight, he is again chased after by the Kam army. He breaks into the house of KWOK and YEUNG to hide away from the army. KWOK and YEUNG are two sworn brothers. They are living together and their wives are both pregnant. They help YAU to fight against the Kam army and they later become very good friends.
