It tells the story of a series of Binjiang City special police detachment "Hummingbird Squad" to crack down on illegal crimes and protect the peace of the masses. The "Hummingbird Squad" is a group of elite police officers with modern law enforcement awareness and ability, they are full of humanity and a sense of faith, in the community, on the streets, in the arrest, in the front line of law enforcement without gunpowder smoke but sacrifices, everywhere is their heroic and non-stop busy figure, is the people's "visible sense of security".