He is the nation's top agent, codename “Hidden Dragon.” Forced to retire after an injury, he lies low in the city, keeping his skills and achievements under wraps.
She is Su Wanwan, a decisive CEO on the surface, but secretly the “All-Knowing Sage of the Underworld,” in control of an underground intelligence network.
A “great purge” targeting the heart of the city brings their two paths, which should never have crossed, together by chance.
Chen Kai discovers that this woman's intelligence network is even more useful than the gun in his hand.
Su Wanwan also realizes that this seemingly ordinary man can summon elite forces with a mere gesture, forces that her entire intelligence network cannot even uncover.
When a modern agent encounters the traditional underworld, and the machinery of the state collides with the underground order,
the dragon is destined to take flight. And this underworld will be transformed forever by their alliance.
