Natsumi Tsujimoto was running late on her first day as a patrol officer for the Bokuto Police Department, so she decided to take a few shortcuts on her moped. However, her plan backfired when Miyuki Kobayakawa, an accomplished police driver and mechanical prodigy, pulled her over and issued a citation. Despite this rocky start, Miyuki became Natsumi's partner, and they formed an unbreakable bond. Through traffic mishaps, reckless drivers, and severe typhoons in Tokyo, Natsumi and Miyuki's partnership remained steadfast.