In the late 20th century, highly advanced robots, known as Labors, where created for construction purposes. However labors soon became used in other areas other than construction. Other labors were developed to be used in the military, for under sea exploration and even recreational purposes. However with the growing amount of labors there has been an increase in what is called Labor crime - crime involving the use of labors. These involve a range of crimes, from terrorist action to drunken or disgruntled industrial workers running amuck. To combat this new type of crime, the Tokyo Metropolitan Police Department have created the Special Vehicles Section 2 or SV2. The division has the use of Patrol Labors, or PATLABORS, which are labors specially designed for police purposes. There are two units in the SV2, Unit One is commanded by Shinobu Nugumo, and the 2nd Unit is commanded by Captain Kiichi Goto. The series mainly focuses on the adventures of the officers in the Special Vehicles Section 2, Second Unit.
The members of the Second Unit have a reputation of being reckless and disobedient, as in they don't go "by the book" most of the time. The SV2 Second Unit is referred to, by the public, as an embarrassment to the police force, a waste of public funds, and a dumping ground for "missfits". However their reputation are only speculation since most people don't see that they do get the job done, no matter how they go about it. The true description of the Members of the Special Vehicles Section 2, Second Unit are that they are courageous and loyal to their duty.