In a city of love and prosperity, a city of lost hope and premature death, veteran detective Hei feels it all: the hurt, the helplessness, the horror. When his father-in-law, the billionaire benefactor Kim, is gruesomely murdered in his palatial mansion, he enlists the assistance of his former partner turned private detective.

When terrorists abduct a deadly government attack robot, the call is put out to the Gen-Y Cops, an elite task force with lethal fighting skills. Together with a trigger-happy FBI agent, the Gen-Y Cops race against time to destroy the robot before it destroys their city.