Lang Sam Lung resigns and returns to his homeland. Wan Hun and Wan Cheng, in disguise, mix themselves into the group of sedan-chair bearers that Lung hires.
To receive Lang Sum Lung, Lang Vat Fung orders his servants to renovate the Lang's Fort. Master Poison arrives suddenly, asking to spend the night at the fort. Lang Yat Fung is forced to receive him for fear of his threatening him with his martial arts. Falling for Fung's daughter, Ching Ping, Master Poison claims to return five days later to marry her.
Taking a chance, Wan Cheng and Wan Hun secretly kill Lung's guards. Not having the heart to kill a guard whom he finds to be a woman in disguise, Cheng, however, is attacked by her by surprise. Having been following Cheng secretly, Tit Chung Tong gives him a hand and kills the guard.
Hun, Cheng and Tong create false alarm to scare Lung, forcing him to hide himself at the whore house and eventually fall into their trap.