A look at the SDU in the Royal Hong Kong Police Force - how members are selected, how they are trained, their lives, what they think, the relationships between SDU members and their friends and the pressures they face.

Tenth film in the 10 film series titled The New Option Hon Kin, head of the police's Organized Crime Division, has been pushed to the edge by a triad boss intent on killing him. In a fit of fury, Hon embarks on a violent rampage that ends tragically. With the very existence of the Special Duty Unit(SDU) now in jeopardy because of the aftermath, Commander Stone (Michael Wong) must make up his mind and decide on SDU's future.

Faced with early retirement and difficulty recruiting, Stone is forced to lower his standard of acceptance. When a vicious, military-trained group of criminals commit a chain of big-time robberies, the Flying Tigers are called into action once again.

Eighth film in the series titled The New Option. A crime syndicate specializing in the making of counterfeit credit cards was very active in Hong Kong and the nearby Guangdong Province. The Hong Kong police found out that the syndicate had its headquarter in the mainland. One day, Stone's daughter Ling Ling and her boyfriend Mike was suddenly back from Canada. Unknown to Ling Ling, Mike worked for the counterfeit credit card syndicate. He went on a shopping spree with Ling Ling, then handed all the things they bought over to the syndicate. However, he grew careless, leaving a trail for the police. The syndicate killed Mike. Finally, could Stone and SDU rescue the situation?

Ninth film in the series titled The New Option, it once again stars Michael Wong as Stone Wong, an SDU captain who's a damn man at his job. Stone is a no-nonsense SDU trainer who must initiate young studs into their SDU world.

Fifth film in the series titled The New Option, it again stars Michael Wong as Stone Wong, an SDU captain who's a damn man at his job. Stone is a no-nonsense SDU trainer who must initiate young studs into their SDU world.

Sixth film in the 10 film series titled The New Option. Hon's sister, Bibi was crushed. She phoned Hon for help. Hon beat up the crook. Unfortunately the whole incident was captured by the CCTV and was suspended from this post. Fatso came to his rescue by forcing the crook to withdraw his complaint. Hon was re-instituted but he owed a favor to Fatso which might someday cost him dearly. Jason, son of Fatso, had employed some thugs from the mainland to swindle money out of the insurance company. The thugs read from the newspaper that the amount reported lost far exceeded the amount they had robbed. They asked for compensation from Jason. While he was negotiating with the thugs, the police and the SDU surrounded the building to comprehend the thugs. But when Lun saw Hon and Jason...

Seventh film in the series titled The New Option. Lucky Lun was sent to the hospital. He was shot in the spine and was paralyzed from the waist down. Hank told Stone that he returned to Hong Kong to enter a shooting competition. He donated blood to Lucky Lun and helped all those who needed him. There was a big money laundering case in which three prosecution witnesses were in the police's witness protection program. On the first day of legal proceeding, the first witness was shot. Ann and Stone deduced that the killing were done by an expert sniper. The second witness was shot in much the way as the first. All evidence pointed to Hank. When Hank sensed that Stone began to suspect him, and told Stone that he had bought the airplane ticket to the States. When it was time for the third witness to go to court, Stone exchanged clothes with him and waited for the killer.

A group of high school outcasts get revenge on the students that torment them.

Third film in the 10 film series titled The New Option, it again stars Michael Wong as Stone Wong, an SDU captain who's a damn man at his job. Stone is a no-nonsense SDU trainer who must initiate young studs into their SDU world.