Ekin Cheng stars in this gritty triad action drama as Dragon, a talented former hitman who has reformed and is now a waiter at a blue collar cafe. However, when his ex-girlfriend becomes the queen of the Underworld, she becomes determined to entice him back to a life of crime. Resistant at first, Dragon gets pulled back into the crime world as a violent gang war erupts.
As election time nears, current Triad chairman Lok faces competition from his godsons. At the same time, Jimmy looks to increase his business relations with mainland China.
A gangster's son is accidentally killed during a drunken dispute with a rival gang, and Officer Milo's task force is assigned to the case. He soon learns that a hitman has been hired to take out the rival gang leader. While Milo and his crew desperately try to find and stop the hired gun, fearing all-out war in the streets, Lai Fu, a smart but inexperienced killer from a small town in the mainland, arrives in Hong Kong to do his job.
When the branch leader position is open for Tuen Mun, Chicken decides to run for it and is up against fellow Hung Hing member Barbarian, who resorts to ruthless Tung Sing member Thunder Tiger (Roy Cheung) for help in his candidacy. The triad also has to deal with finding a new chairman to the Hung Hing Society, Chiang Tin Yeung (Alex Man), Chiang Tin Sang's older brother, who resides in Thailand. Young and Dangerous 4 also brings in new characters first appearing among the Hung Hing ranks, such as Ben Hon (Wan Yeung Ming), Sister 13 (Sandra Ng) and Prince.
Showcasing the earlier years of Chan Ho Nam (Nicholas Tse) and Chicken (Sam Lee), this prequel tells of their time during their willingness to follow Hung Hing's Uncle Bee. The film co-stars Shu Qi and Daniel Wu.
Triad member Chicken is designated by Taiwan's San Luen Gang to marry Nanako, the daughter of the fifth generation leader of the Yamada Gang in Japan. Later, the leader of the triad group gets murdered. Actually, all the San Luen Gang members suspect Chicken attacked their leader Liu, in order to make a chance for him to rule the Gang and thus have adopted an extremely hostile attitude towards him...
A hired killer pairs up with an amateur filmmaker to provide clients with satisfying footage of enemies getting whacked in this black comedy. Business is down, so hit man Bart is thrilled when Mrs. Ma hires him to kill her enemies and film the murders. But Bart's first video killing stinks, so he hires filmmaker Chuen. Although business subsequently picks up, their notoriety creates complications.