Although Chicken does not make an appearance, Chan Ho Nam finds a new love interest in the form of Mei Ling (Shu Qi). Meanwhile, Tung Sing returns to cause trouble again for Hung Hing, in the form of new leader Szeto Ho Nam (Mark Cheng). Young and Dangerous 5 occurs during the transfer of Hong Kong sovereignty to China, with the "boys" becoming "men", as they develop and mature into more business-like dealings.
When a freighter is viciously attacked in the Pacific Ocean, a team of experts -- including biologist Niko Tatopoulos and scientists Elsie Chapman and Mendel Craven -- concludes that an oversized reptile is the culprit.
Having never fully recovered from a prom date that became a total disaster, a man finally gets a chance to reunite with his old prom date, only to run up against other suitors including the sleazy detective he hired to find her.
Jeffrey "The Dude" Lebowski, a Los Angeles slacker who only wants to bowl and drink white Russians, is mistaken for another Jeffrey Lebowski, a wheelchair-bound millionaire, and finds himself dragged into a strange series of events involving nihilists, adult film producers, ferrets, errant toes, and large sums of money.
When some very creepy things start happening around school, the kids at Herrington High make a chilling discovery that confirms their worst suspicions: their teachers really are from another planet! As mind-controlling parasites rapidly begin spreading from the faculty to the students' bodies, it's ultimately up to the few who are left – an unlikely collection of loners, leaders, nerds and jocks – to save the world from alien domination.