The story centers on the Chinese Special Police Unit, from their hard training to their first mission.

At the beginning of the 1990s, famous tomb explorer Hu Bayi decided to retire and move to the United States with his girlfriend Shirley. But before his wedding, Bayi discovers his first love Ding Shitian, who supposedly had died in the "One Hundred Cave" 20 years ago, is actually still alive. Together with Shirley and his old exploration partner, Bayi unravels a terrible millennium-old secret...

After reuniting with his love of life, Sha Sha, underground boxer Gao Yuan escapes from the gangster who controls him. Hao Ge kidnaps Sha Sha so Gao Yuan would return to the game.