 High&Low's story began at a town that was once under the rule of a powerful organization called Mugen.But after a fight with the one enemy that they couldn't crush, the Amamiya Brothers, Mugen suddenly broke apart and became a legend of the past, and five new gangs that took control of the area were formed.Based on the initials of the five gangs that lead each territory, the town began to be known as the SWORD area.