In the underground city, where people are born, live, and die without ever seeing sunlight, a gang led by Levi Ackerman operates. The scoundrels managed to obtain devices for 3D maneuvering and learned to use them skillfully, to quickly evade pursuers. One day, a wealthy and influential man offers Levi Ackerman's gang a deal—in exchange for citizenship on the surface, they must pull off one dirty job.