Building Bad delves into the dark art of criminal ingenuity and its evolution through history, exposing the underworld innovations devised by some of the most resourceful criminal minds of all time. From the illicit use of technology to back alley engineering, Building Bad showcases the lengths criminals will go to to achieve their goals. Viewers are taken inside the clandestine operations of Mexican cartel gunsmiths, the illicit bone trade in India, and the inventive smuggling tactics used by prohibition-era bootleggers.