The officer in charge of Team A, CHIN HON-TO, leads the rookies of the Special Duties Unit (SDU)/Flying Tigers together with his current team members to conduct some outdoor training. While there, one team member, YU HOK-LAI, demonstrates how to successfully hop on the roof of the high speeding car driven by his co-worker, CHONG CHEUK-YUEN, from another roof of a moving car by solely depending on his own feeling and trust built between his team members. Having seen this, HOK-LAI's girlfriend, SO MAN-KEUNG, who is also one of the rookies, feels very satisfied. Unfortunately, MAN-KEUNG sprains her ankle while jumping...... Under orders to set out for an operation, HON-TO learns that ON TIN-MING and his three armed henchmen have taken a large amount of civilians hostage at the high court.… ...

International drug dealer TSUI KEI-HAP is taken into custody by INTERPOL agents then back to his country to face trial, but he has to be accompanied by his personal doctor HON YU the whole journey because he suffers an acute disease. Out of the blue, they are ambushed and attacked by killers when on board the plane, and KEI-HAP is injured and sent to a Hong Kong hospital. During his hospitalization, the Hong Kong police force, under the request of INTERPOL, dispatch the SDU led by CHIN HON-TO to protect and escort the two to leave Hong Kong safely...... CHUNG WAI-YAN would like to resume her former duty as a CIB officer, so she is required to undergo several psychological evaluations. Although her superiors such as ZI-LUNG and the others are very satisfied with her performance, she is still under probation.… ...

Mute NGAR, crippled FAI, blind MANDY and deaf LUNG are sworn sisters, and they run a business to sell sporting goods. However, the business is a mere facade, and in fact, they rob the rich and give to the poor once they find out that person makes ill-gotten gains. HON-TO trains WAI-YAN, trying to help her overcome her traumatic experience, but to no avail. Noticing that everyone is talking about the vacant position of the Chief Inspector, HON-TO learns from the Commissioner that CHI-LUNG has been appointed as the new Chief Inspector. With all the SDU members being invited to attend the PHAB’s Happy Day (Physically Handicapped and Able-Bodied), HON-TO re-encounters his first love NGAR in fencing competition, to his surprise, NGAR has become mute. CHEUK-YUEN and TAK-WAI help all the contestants complete their shooting training, during which TAK-WAI finds FAI irresistible and falls in love with her at first sight.… ...

WAI-YAN sneaks into a gathering activity of a Japanese secret society after receiving intelligence in connection with its alleged involvement in a local poisoning terror. The most-watched Japanese show is about to relocate to film in Hong Kong, above which the Japanese superstar MIRYO FUJII is also going to take part in the show by then. Due to this, CHI-LUNG is under orders to dispatch HOK-LAI, MAN-KEUNG, CHEUK-YUEN and KA-MING to participate in the show as well. Off-duty CHEUK-YUEN happens to be there when a robbery takes place, during which he is astonished to see that his girl friend WAI-WAI has become a patrol officer. With the Japanese show "Running Army" officially starting filming, HON-TO and CIB staff are responsible for monitoring. Seeing that the carefree siblings from the SHU family come to take part in the show, HOK-LAI cannot help feeling surprised.… ...

Former SDU sniper TIGER HO likes gathering information in his off time so as to help the police solve crimes in secret. HON-TO and CHI-LUNG announce that all the rookies have officially become SDU members, following which they celebrate with them. At midnight, HOK-LAI receives a text message from CHI-LAI, who makes some excuses to keep HOK-LAI there after he arrives at the shopping mall. When CHEUK-YUEN and TIGER HO have a target competition, TIGER HO is attacked and he deduces that must have something to do with his good friend, TIN SUN-HEI. Bumping into HON-TO and WAI-YAN on a street corner, CHUNG-CHAI is very delighted to see them, above which he even tells WAI-YAN about the story of HON-TO and CHEUK-YUEN's elder sister CHEUK-WAH. TIGER HO takes action to solve a drug trafficking case without knowing that SUN-HEI secretly sends someone to steal the drugs.… ...