A four-part anthology in the spirit of The Twilight Zone, this film starts off with a group of commuters stranded at a train station in the rain, listening to stories told by one of the group. These include tales of a group stranded in the mountains and haunted by guilt over a death they inadvertantly caused, an emotionally broken chessmaster pressed into playing a real-life game for an eccentric millionaire, a wandering medieval samurai who finds a modern-day cell phone on the ground and a person on the other end asking questions about the past, and a young couple who agree to try a computer simulation of what their future as husband and wife would be like.

Weeks after Chan Ho Nam (Ekin Cheng) is elected branch leader of Causeway Bay of the "Hung Hing" Society, "Chicken" Chiu (Jordan Chan), after joined the Taiwanese "San Luen" triad, is reinstated into Hung Hing by Chairman Chiang Tin Sung (Simon Yam). At the same time, rival triad "Tung Sing", led by "Camel" Lok (Chan Wai Man) begins to make a name for itself, establishing bars and clubs alongside Hung Hing's areas of operations. Things become heated when Tung Sing member "Crow" (Roy Cheung) fuels a deep-seated rivalry between him and Ho Nam, with the threat of open war between the two societies. Meanwhile, Ho Nam's stuttering girlfriend Smartie (Gigi Lai), who was critically injured in a vehicular accident and slipped into a coma, reawakens but with no prior memories to her meeting with Ho Nam for the first time. Regardless, Ho Nam assures her he and his friends will protect her. To add in a stick of comedy, Father "Lethal Weapon" Lam (Spencer Lam) introduces his daughter Shuk Fan (Karen Mok) to Chicken, having been good friends and a source of advice for him.

In a flashback to Young and Dangerous, "Chicken" Chiu (Jordan Chan) heads into exile and decides to go to Taiwan, after a failed hit. The first part of the movie details the events leading up to his return to Hong Kong, following the death of his boss "Uncle Bee" (Frankie Ng). In Taipei, Chicken's cousin introduces him to the "San Luen" Triad, headed by an influential Taiwanese senator. Although the atmosphere in the city is quite different than Hong Kong, Chicken gains the senator's favor by assassinating his rival. Pleased with the youth's initiative, he promotes Chicken to branch leader and does not even mind Chicken having been smitten with his beautiful mistress. Upon hearing news of Bee's death, Chicken returns to Hong Kong and helps best friend Chan Ho Nam (Ekin Cheng) to get rid of corrupt "Hung Hing" Chairman "Ugly Kwan" (Francis Ng).

Chicken did not return for this film and Chan Ho Nam is on his own. He finds a beautiful new love interest, (Shu Qi) and has to deal with some young "Tung Sing" triad members trying to make something of themselves. Young and Dangerous 5 happens during the transfer of Hong Kong sovereignty to China. We see a transition of the "boys" becoming "men" as they develop maturity and go into more business-like dealings.

Beginning in 1985, teenagers Chan Ho Nam (Ekin Cheng), his best friends "Chicken" Chiu (Jordan Chan), Tai Tin Yee (Michael Tse), Pou Pee (Jerry Lamb) and older brother Chow Pee (Jason Chu) idolize the local "Hung Hing" Society and one of its leaders, "Uncle Bee" (Ng Chi Hung). When Ho Nam and his friends are beaten by Hung Hing's "Ugly Kwan" (Francis Ng) and his men following a misunderstanding, they decide to join the society, following Bee. Ten years later in 1995, Ho Nam and his buddies have established themselves as Bee's enforcers, performing their first successful hit on Kwan's right-hand "Ba Bai" (Joe Chen). At the same time, Brother Fai Hung has the stuttering Smartie (Gigi Lai) carjack Ho Nam's Toyota MR2 and demands payment, but unfortunately she gets caught by Ho Nam and his friends and is punished by eating dozens of Chinese barbecue pork buns.

The film focuses on a branch leader position has opened up in Chicken's group and he is up against Barbarian to get it. The "Hung Hing" triad has to deal with finding a new successor to be the head of the Hung Hing group and they get the old boss' brother who resides in Thailand. Young and Dangerous 4 also brings in new characters in the "Hung Hing" group such as Ben Hon, Sister 13, and Prince.

Jenny Cole lives with her husband and son in middle America. She is pregnant and starts to have very vivid dreams about a small city that has a big church. She then starts talking to her mother about it and her mother shows her some drawings she made when she was a child. To her amazement they are identical to the drawings from her dreams that she is now having. Jenny and her mother do research and find that the dreams are about a small town in Ireland in the 1930s. The mother gives Jenny, her son and her husband tickets to go to Ireland, so that she can find out about her dreams. Had Jenny lived in the past after all as Mary Sutton?

This a prequel to the popular television series. In it a young Hercules, wanting to impress Zeus tries to recover something that his half-brother Ares stole from Zeus. But when his friend Iolaus causes him to lose it, he is more depressed. His mother, Alcmene urges him to go to an academy for warriors led by a centaur, Cheiron. Iolaus is also there and they also meet Jason, heir to the throne of Corinth. When Jason learns that his father is ill, Hercules suggest that they seek out the Golden Fleece cause it might save his father. However, Ares is doing everything he can to stop them.

Set in a post-apocalyptic Japan of the near future where the sea level has risen and flooded much of the coastal areas and Mt. Fuji has erupted within living memory. The population has been considerably reduced and political and technological institutions have broken-down. Local communities have become nations and telephone and television no longer exist (although coffee vending machines and streetlights stubbornly continue to work). There are strange new animals and plants (like flying fish and glowing streetlight trees). The remaining people have adopted a slower-paced, simpler way of life and rely more on each other. Along with the human population are some intelligent, humanoid robots. One of the robots, a female named Alpha, runs a café by the same name in the country outside of what remains of Yokohama. With her trusty motorscooter and her camera she travels around the area making friends with the humans and robots, having new experiences and observing the passage of time.

In modern Hong Kong lives the last vampire family in China: grandpa, parents, and a daughter and son who are in their early 20s. The two young adults haven't yet earned their fangs, and, in fact, may be human not vampires after all. The daughter, Tong, has decided to lose her virginity. Will her first boyfriend be a lover or a victim? The son, David, a medical student, falls in love with a lovely, shy, and humble orderly, Julie May Chu. David's outgoing friend Delon tries to help David out and, in the process, becomes Tong's friend. What fate awaits these four youths?