As the 20th Century was nearing its end, a new Industrial Revolution brought forth unprecedented advances in robotics. The invention of the Labor - a humanoid-type, multi-purpose construction machine - emerged as the wave of the future. Making older industrial equipment virtually obsolete, the Labor, unfortunately, also made a good terrorist weapon.

To combat the rise in Labor crimes, the Tokyo Metropolitan Police Department established the "Special Vehicles, Section 2," comprised of specially designed Patrol Labors - PATLABORS.