Jake Tyler (Sean Faris) has recently moved from Iowa to Orlando, Florida with his mother, Margret (Leslie Hope), and younger brother, Charlie (Wyatt Smith), to support Charlie's shot at a professional tennis career. Jake was a star athlete on the football team at home, but in this new city, he is an outsider with a reputation for being a quick tempered brawler after an internet video of him starting a fight at one of his football games after a frustrated player from the opposing team taunted Jake about his father, who died in a drunk driving accident circulates around his new school.
Eleven year old Randy Daytona becomes anxious when he learns that his father Peter has bet on his performance in the 1988 Summer Olympics table tennis finals. During his first game between his opponent Karl Wolfschtagg from the German Democratic Republic, Daytona has an accident and suffers an injury. Unable to continue, he loses the match. Loan sharks in the employ of criminal mastermind Feng murder his father, and Daytona leaves competitive ping-pong.
Bu (Shu Qi) is a beautiful young girl from a small Taiwanese fishing village who discovers a romantic message in a bottle. She heads for Hong Kong to find its writer, only to learn that it was in fact written by Albert (Tony Leung Chiu Wai), a lonely gay man. She, however, meets the wealthy recycling company owner, C.N. (Jackie Chan) who falls in love with her; but the plot is soon thickened by rival businessmen, hired goons, and Bu's confused would be boyfriend.
Gino Felino is an NYPD detective from Brooklyn who has strong ties within his neighborhood. Gino and his partner Bobby Lupo wait to bust up a multi-million dollar drug deal. However, Gino sees a pimp violently assaulting one of his girls and intervenes. Shortly afterward, Richie Madano murders Bobby in broad daylight in front of his wife, Laurie, and his two children.
The story picks up after The Karate Kid, Part II. In the aftermath of his abusive behavior at the All-Valley Tournament, Sensei John Kreese (Martin Kove) loses all of his students. Ostracised and broke, he visits his Vietnam War comrade Terry Silver (Thomas Ian Griffith), the wealthy billionaire owner of a toxic waste disposal business. Silver and Kreese scheme to take revenge on Daniel and Mr. Miyagi (Noriyuki "Pat" Morita), and re-establish Cobra Kai. Silver sends Kreese to Tahiti to rest up and get his life back in order.
In 1943 Tibet, a Tibetan monk is informed that he has fulfilled the prophecies made of him, which include forgoing his name. He is then entrusted by his master with the protection of a Scroll which contains knowledge by which the reader becomes the most powerful of living things, a protection that will keep him youthful and immunize him to injury until, at the close of 60 years, he must pass the knowledge to an heir. The master, who has formerly been the guardian of this Scroll, is killed by German soldiers shortly after the transfer. His pupil, the now nameless Monk, escapes the Nazis.
Continuing from where the first film ended, Wing Chun master Ip Man and his family move to Hong Kong in the early 1950s after their escape from Foshan. There, Ip desires to open a school to propagate his art, as well as make a living during the difficult times, but he has difficulty attracting students due to his lack of reputation in the city. One day, a young man named Wong Leung appears and promptly challenges Ip to a fight, but is easily defeated. Wong leaves humiliated, only to return with some friends to gang up on him. Ip beats them as well. Stunned and impressed by his skills, Wong and his friends become Ip's first students, bringing more disciples to help the school thrive.
Peace-keeping immortals living in clans inhabit a mythical mountain range called Zu, which exists between Heaven and Earth. A demon called Insomnia desires to rule Zu and the world below; it begins wiping out the various clans. In the Kunlun Mountains, Dawn sends away her apprentice, King Sky, because she believes that their emotional attachment hinders their progress. She gives him her weapon, the Moon Orb, to help him train; he is to return only after attaining a higher level. If she cannot be found, the Moon Orb will find her. Moments after they part, Insomnia attacks Dawn and disintegrates her.
Eddie Yang (Jackie Chan) is a Hong Kong police officer cooperating with Interpol in the capture of a crime lord named AJ "Snakehead" Staul (Julian Sands). Snakehead procures an ancient book from a Chinese bookstore keeper, which tells the story of a boy being chosen every thousand years to bind the two halves of a legendary medallion. In Hong Kong, Eddie and Interpol agent Arthur Watson (Lee Evans) lead a raid to capture Snakehead and his men, who are about to kidnap the boy, named Jai (Alex Bao). Eddie and the agents fight off Snakehead's men, infiltrating the temple containing Jai. Jai is saved but Snakehead eludes them. Two weeks later Snakehead captures Jai aboard a cargo boat in Hong Kong. Eddie and a team of Hong Kong police engage and defeat several of Snakehead's men, but Snakehead escapes with Jai to Dublin, Ireland.
Former Marine Mallory Kane (Gina Carano) goes to a diner in Upstate New York to meet Aaron (Channing Tatum). He tells her to get in his car, but she refuses and they fight. He pulls out a gun, but she disarms and pistol-whips him. Scott (Michael Angarano), a customer in the diner, intervenes and Mallory demands his car keys and that he get in the car. As they flee, she explains who she is and what has happened to her. The flashback sequences are intermixed with scenes of their flight.
Present day New York City: Sean MacArthur (Channing Tatum) is a street hawker. One day while selling counterfeit goods at the corner of Radio City Music Hall, a group of young men attempt to force Sean to relocate with his merchandise. These boys work for Harvey Boarden (Terrence Howard), a ticket scalper who controls the corner. Sean fights them off, but does not retain his money or products.
Ma Hon Keung (Jackie Chan), a Hong Kong cop comes to New York to attend the wedding of his Uncle Bill (Bill Tung) who introduces his new, African-American wife Whitney to him down at his supermarket, which he owns and has sold to Elaine (Anita Mui). Uncle Bill's friend, Steven Lo (Jamie Luk), loans him a vintage automobile for the wedding. Later that night, a street gang starts a motorcycle race near Uncle Bill's apartment. They are about to run over his friend's car until Keung jumps down and stops them. He soon starts a rivalry with the street gang when he drives them away from the supermarket that they were robbing and vandalizing. This starts a series of brawls in which the bikers try to corner Keung and finish him off. When a member of the street gang named Angelo (Garvin Cross) gets involved in an illegal diamond deal gone bad and steals the diamonds, the small-time gangsters become the victims of a much larger and more effective criminal syndicate led by White Tiger (Kris Lord). While running away with the diamonds, Angelo leaves them in a cushion, which is unknowingly used by Keung for the wheelchair of a disabled Chinese American boy named Danny (Morgan Lam), who is raised by his elder sister Nancy (Françoise Yip), a lingerie model/dancer who works in a seedy bar and is an associate/girlfriend of the bikers. Keung befriends Nancy and advises her to stay away from crime. When the gangsters see this, they chase Keung and Nancy. After failing to confront Keung, the bikers turn up at Elaine's supermarket and start vandalizing it, during which two of Angelo's men are captured by White Tiger's men, who turn up at the supermarket in search of Angelo. Angelo's colleagues are unaware of his diamond heist and one is executed in a tree-shredder; his remains are given back to the other gangster to show to his friends as a warning to return the multimillion-dollar goods. In the meantime, Keung and Nancy go to the bikers' shed after the latest supermarket attack, and Keung defeats them in another brawl, at which point the shredded remains are brought back.
A clan of ninjas finds an abandoned chest that has been washed onto shore, and find a white baby inside. One of their ancient legends spoke of a white foreigner male who would come among the ninja and become a master like no other would. The boy, Haru (Chris Farley), is raised amongst the ninja, with the expectation that he may be the one of whom the legend speaks. As Haru grows into adulthood, doubts are quickly cast over him for being the great white ninja. Despite not possessing any ninja traits, Haru is clumsy and fails to graduate a ninja with the rest of his class. Left alone to protect the temple while the clan are on a mission, Haru disguises himself as a ninja when an American woman whose real name is Alison Page but calls herself "Sally Jones" (Nicollette Sheridan), comes to the temple to seek assistance. Sally says she is suspicious of her boyfriend, Martin Tanley (Nathaniel Parker), and asks Haru to investigate. Haru finds out that Tanley and his bodyguard, Nobu (Keith Cooke Hirabayashi) are involved in a money counterfeiting business, but cannot find Sally to tell her. Haru leaves Tokyo and goes to Beverly Hills to search for Sally. Gobei (Robin Shou), Haru's adoptive brother, is sent by the clan's sensei (Soon-Tek Oh) to watch over and protect Haru, with Haru unaware of his presence.
Qingcheng, a starving girl, wanders around the land in search of food. She chances upon a boy, tricks him, steals a mantou from him, and runs away. She encounters the goddess Manshen and accepts an offer to enjoy a wealthy and luxurious life and become the most beautiful woman in the land. However, she has a price to pay: She will never find everlasting and true love. She becomes the King's concubine when she grows up.
The film is set in China in 1895 during the Qing dynasty. Wong Fei-hung travels by train from Foshan to Guangzhou to attend a seminar on medicine. He is accompanied by his romantic interest 13th Aunt and apprentice Leung Foon. The situation in Guangzhou is rather chaotic. On one hand, there are protests in the streets against the signing of the Treaty of Shimonoseki. On the other hand, the White Lotus Sect, an extreme xenophobic cult, goes around attacking Westerners and destroying everything regarded as alien to Chinese culture. At one point, 13th Aunt is almost captured by the cult when she tries to take a photo of them, but Wong shows up, fights with the cult members, and saves her.