Being the members of Man Castle, KAT HILL FUNG and YEUNG CHAK FU carry out the order from TUNG and set off to Mon Shan. FU is an erotic person and has intention on MUI when they first met at the restaurant. He poisons MUI with a powder mixture of ‘Yam Yeung’, which will arise erotic urge. Fortunately, HONG and LAM find WAI for help and, rescue MUI at the end. LAM follows WAI and insists to be his pupil. Meanwhile, MUI is attached to WAI and tries to please him. NAM is annoyed by them; thus, poisons them with soup and gets rid of them with WAI successfully. They continue their schedule to find LEUNG and, arrive Mon Shan at last. Despite the long journey, YI does not welcome them to visit Mon Shan at all. Fortunately, WAH comes out and leads them to see LEUNG immediately. LEUNG brings up a story happened eighteen years ago, which makes LUNG the enemy of the martial world……