Known as the City Hunter, Ryo Saeba works as a "sweeper," taking on tasks that the police have declined or are unable to handle. With the help of his partner Kaori Makimura, their aim is to tackle any issues that come their way effectively. Even though Ryo devotes most of his time to preserving Tokyo's welfare, he enjoys pursuing love interests, which Kaori puts a stop to by wielding a potent hammer.