The story takes place during the Manchu rule under Emperor Chien-lung. Fong Sai Yuk is in the Red Flower Society as a new member. He has no experience and has never been on a mission before. Sai Yuk is with his wife, Ting Ting, at a festival. There are fireworks and dragon dancers on the streets. Sai Yuk, Ting Ting, and Red Flower Society (RFS) leader, Chan Ka Lok, are eating in a restaurant overlooking the dragon dancers. Sai Yuk and Ting Ting are at a table eating when a monk tries to enter. The waiter stops the monk but Sai Yuk helps the monk in. There is a girl dressed as a boy sitting near Sai Yuk. She throws one of her chopsticks at the waiter and the waiter falls down on his knees. The monk dines with Sai Yuk and Ting Ting. The monk offers to tell Sai Yuk's future.

He says that Sai Yuk will live a very extraordinary life. He tells Ting Ting that she will have one boy and one girl. Sai Yuk is astonished that he will only have two children. The monk replies that Sai Yuk will have two boys and two girls. That implies that Sai Yuk will have another wife. Ting Ting gets mad and leaves. Sai Yuk runs after her. The monk starts to talk to Chan Ka Lok. The monks bows down and says that Chan is the emperor. Chan remembers that when he was young, he had to flee to Japan under the Red Flower Society's protection. His mother gave him a box, which had documents to prove that he was the real emperor. While he was in Japan, some samurais stole the box. The monk then warns Chan that someone close to him will betray him and someone close will save him.

Meanwhile, Sai Yuk and Ting Ting are on the roof talking about their love. Ting Ting starts to complain that Sai Yuk doesn't declare his love for her enough. Sai Yuk closes his eyes and says that he loves her. However, the girl dressed as a boy had climbed on the roof and was laying next to Sai Yuk. Ting Ting gets mad and tells Sai Yuk to slap her. They start arguing until some men call for the girl and she leaves. Suddenly some dancers jump into the restaurant and splash gasoline meant for Chan, but hits the monk. They set the monk on fire. A fight starts to break out. Sai Yuk runs to help Chan. While fighting, one of the assassins gets his arm injured and all the assassins flee. A meeting is held to report changes in the RFS. A woman holding her new born son asks Chan to name her son. She throws her baby in the air and tries to kill Chan. Chan already knew the woman's intent and hit her. Yu suddenly kills the woman. The woman had a mask on and was an assassin. Yu is the son of the former RFS leader but Chan was named the new leader and not him. Yu is very jealous of Chan. Yu also has a bandage on his arm.

The members find out that Yu brought the woman here and his son told Chan that he saw his father talking to her before the meeting. Yu tries to kill his son. Sai Yuk stops him and insults Yu for being a coward. Chan stops the fight and punishes Sai Yuk for his behavior. That night, Yu challenges Sai Yuk to a fight. Chan stops the fight and he yells at Sai Yuk for his behavior. Ting Ting tells Sai Yuk to visit his mother at home but Sai Yuk swears that one day he will become the RFS leader. An official working secretly for the RFS enters a restaurant and asks Chan for some water. He throws his towel down and leaves. On the towel it says that some samurais will be traveling at the river with the box. The next day, Chan chooses some men to retrieve the box. Sai Yuk was chosen to go because Dong, his friend, refused to go.

Each member was given a bamboo stick with their number on it. Sai Yuk had the unlucky number 49. When Sai Yuk left, his mother came to bring him soup but he had already left. The members hid behind some windmills waiting for the ambush. Sai Yuk spots the girl at the inn on a raft heading towards the samurais. The members ambush the samurais and Sai Yuk tries to save the girl. She gets paralyzed by the samurai's nerve block. Sai Yuk unparalyzes her top but not her legs because he didnt know how. He carries her on his back while fighting. The samurai leader paralyzes Sai Yuk but suddenly, another samurai jumps in to save him.

All the other samurais bow down to this samurai. This samurai was Sai Yuk's mother. She asks for the box but the girl motions to the other samurais not to. Everyone starts fighting again and Sai Yuk's mother gets paralyzed. The samurais are motioned to leave. Sai Yuk is carrying the girl and his mother is standing there next to him. All three are paralyzed. Sai Yuk's mother then uses bees to sting her face to unparalyze herself. She then unparalyzes Sai Yuk. Sai Yuk asks his mother how to unparalyze the girl. Sai Yuk hits the girl in the stomach and leaves with his mother. The girl had secretly stolen Sai Yuk's bamboo stick and keeps it as a memento.

Back at the RFS headquarters Sai Yuk's mother meets with Dong. Song and his mother were lovers and they get drunk. They spend the night together. The box arrives at the palace and the identity of the girl is revealed. She is the emperor's daughter named Man Yin. The official working secretly for the RFS reports to Chan that Man Yin is in love with Sai Yuk. Chan tells Sai Yuk to send the girl a love letter and pretend to like her so he can get the box. Sai Yuk decides not to tell Ting Ting about this. He also makes a bet with Yu that if he cant retrieve the box he will disable his kungfu. Sai Yuk meets Man Yin at a temple. He is sweating a lot and his mother pushes him so he would kiss Man Yin. Sai Yuk closes his eye and kisses her. When he opens his eye, he saw a bunch of nuns in front of him puckering their lips. He thought he had kissed on of the nuns. Man Yin then tells Sai Yuk to prove himself in a competition to marry her.

Man Yin will give Sai Yuk the box when they get married. On the day of the competition, Sai Yuk and his mother show up late because Sai Yuk wanted to carry a huge flag. The competition already started. There are four other competitors. They have to climb at a tower and retrieve a red ball. If you fall, you lose. Sai Yuk comes flying in a kite to the top of the tower. Man Yin is seated at the top of the flower and she kicks the other competitors so they can't get the ball. Sai Yuk defeats all the other competitors. Suddenly, Ting Ting dressed as a man, jumps onto the tower. She argues with Sai Yuk because he is trying to marry someone else. She then jumps off the tower but Sai Yuk jumps in after her and catches her in midair. Man Yin also jumps and Sai Yuk also catches her. The two of them are in midair in Sai Yuks arms. Sai Yuks mother also decides to jump so her son and catch her but both of Sai Yuks arms are full. She falls flat on her face and gets angry because no one catches her.

Ting Ting leaves and Sai Yuk is declared the winner. Man Yin forces Sai Yuk to yell out that he loves her. On the night of the wedding, Man Yin gets angry with Sai Yuk because he only got married with her for the box. She gives him the box and leaves. Sai Yuk, Ting Ting, and Sai Yuk's mother flee but are captured. Man Yin saves them by renouncing her relationship with her father. Man Yin then gives Sai Yuk back the bamboo stick and leaves. Now Sai Yuk knows that she is really in love with him. On the way back to headquarters, Sai Yuk, Ting Ting, and Sai Yuk's mother are chased by assassins. They become separated. Sai Yuk returns to headquarters and in front of all the members burns the box. Yu is mad because he wanted to destroy the box. Chan realizes that the box was a fake. Yu tells Sai Yuk that he had lost the bet. Chan was forced to cut Sai Yuks nerves. Yu then disposes of Chan and his followers. Now Yu is the new leader. Yu also sends his men to kill Sai Yuk.

Dong saves him and gives him a book to help him repair his nerves. Dong gets killed and Sai Yuk's mother is captured. She is strung by the neck on top of a tower of chairs. After some time, Sai Yuk regains his kungfu and goes to save his mother. After some intense fighting, Sai Yuk uses the fatal nerve block to kill Yu. The rope on Sai Yuks mother breaks and she falls. Luckily Man Yin and Ting Ting break her fall.

Now Ting Ting and Man Yin are both Sai Yuk's wives. Chan is also freed by the official working for him. Sai Yuk then gives Ting Ting and Man Yin each a jade bracelet saying that it is a family heirloom. Ting Ting and Man Yin were trying to give each other the jade bracelet when they find out that the bracelet was similar. Sai Yuk's mother pulls out a packet of jade bracelets and hands it out to Chan and his servants. Man Yin and Ting Ting are mad at Sai Yuk and chases him on horseback. The End.