Soon, sizable mecha known as Labors are produced to support reconstruction endeavors in major nations affected by global warming. Japan launches Project Babylon to carry out land reclamation with the aid of Labors. These machines are now utilized by the police, military, and civilians alike.
Nevertheless, terrorists, ordinary criminals, hooligans, and rebels aim to exploit Labors to achieve their objectives. In response to this threat, the National Police Agency creates the Special Vehicles Division, an exclusive force of Labors trained to counter the possibility of Labors being employed for unlawful purposes.
