Based on a real murder case where a dismembered corpse of a murdered 16-year-old prostitute girl was found in Hong Kong in 2008.
Fai, once a world champion in boxing, escapes to Macau from the loan sharks and unexpectedly encounters Qi, a young chap who is determined to win a boxing match. Fai becomes Qi's mentor and rediscovers his passion to fight not only in the ring but for his life and the cares.
Kwok Ching is a soon-to-retire television weatherman who really has long aspired to be a news anchor. At home, he's single-handedly brought up three children, but they are fed up with him meddling in their lives. His eldest daughter Mei Mei is a successful lawyer, and married to househusband Yao Ming. Tomboyish second daughter Ching Ching manages a supermarket and is in love with sissy promoter Lok Yi Nga. The youngest son Fu Shing is an otaku enamored with beautiful starlet Vivian and he unwittingly becomes the romantic rival of billionaire Roberto. Meanwhile, struck by the shocking news of the world's impending doom, Kwok Ching is determined that he must reunite his family before it's too late...
Living in the guilt of sacrificing his informant in a previous operation, Criminal Intelligence Inspector Don Lee is wary when his superior orders him to send another informant to spy on the criminal operations of Barbarian, a vicious gangster plotting a jewelry heist. He seeks ex-convict Ghost, who agrees to work for Don despite vowing to go straight since he's desperately in need of money to repay a debt and save his sister. Ghost's driving skills help him infiltrate Barbarian's gang and earn his trust, but by feeding information to Don and hooking up with Barbarian's girlfriend Dee, Ghost is pushing himself into a tight and deadly corner...
Lin is a plain-clothes cop in the crime-riddled district of Mongkok who bungles a vice operation directed at mainland prostitues. He falls for a ditsy hooker who tells him the love of her life is a killer who once svaed her life in a shootout.
A dimwitted thief, mistakes for a spy, in order to free himself he holds the honest driver, as a hostage. They end up in a tunnel and traveled back in time. Throughout their travels, they meet figures in the martial arts world including the "God of Sabre" and "Sword Saint."