In the futuristic setting of Mega-Tokyo, A.D. Police follows the elite police unit dedicated to managing rogue Boomers in the bustling city. Officer Kenji Sasaki grapples with a tough situation as he witnesses the loss of yet another partner to a violent boomer attack. Forced to take a break from duty, Kenji is surprised to find himself paired with a new partner, the German officer Hans Kleif. What adds to the tension is the fact that Kenji had unknowingly clashed with Hans the night before in a bar brawl. Amidst the usual challenges of dealing with dangerous Boomers, Kenji must also navigate the complexities of working alongside his unexpected new companion.