Ryo Saeba works as a "sweeper" in Tokyo. He acts as a troubleshooter, clearing the streets of scum, and assists desperate individuals. At times he serves as a bodyguard, at others as an assassin; whatever Ryo undertakes, he executes it proficiently. Indeed, his sole weakness is his libido—he adores women and occasionally acts foolishly in their presence. Fortunately, he has associates like his partner Kaori Makimura to keep him in line.