Nakaido Gota is a detective at the Kanagawa Prefectural Police Station. Majima Shuhei is a prosecutor in the Yokohama District Prosecutors' Office in Kanagawa Prefecture. Gota is the kind of detective who tries to catch criminals as hard as he can and he wants to be thanked by the victims. Shuhei believes social justice is to gain convictions for criminals. These two men, who are righteous and enthusiastic about their jobs, face various cases and work together to solve them.