The Hong Kong Airport Special Police Unit (ASU) is a special police force responsible for maintaining public and aviation security, counter-terrorism, key personnel protection, disaster support and many other areas. Encountering different situations on duty, they see the joys and sorrow of life that make them reflect on their own lives. With every step forward, they establish a sense of mission as the airport security police.

Sisley Choi Si-Puias San Hoi Ching/" Eagle 4"/"Sanjay"
Owen Cheungas Cheung King San / "Hill"
Roxanne Tongas Yu On Na / Na Na /"NaNa"
Mat Yeung Mingas Ma Yong Yee / Easy Gor /"Easy"
Gloria Tangas Ho Si Wa / Ah An /" Eagle 6"/" Silver"
Hugo Wong Tsz-Hangas Cheung Chan Hak / Cheung Sir / Lou Ban /"Cesar"
Eddie Kwan Lai-Kitas Man Wing Keung/Man Sir {Head Boss}
Regina Hoas Lee Chi On / "On On" [Easy's girlfriend]
Lai Chun Yeas Keung Hau Cheng/" Eagle 2"/"Gutty"/Kau Keung
Jonathan Wong Chi-Hinas Cai Tin Lok/ Cai Sir /" Eagle A"