Nippon Noir : He suddenly wakes up in the middle of a forest. Next to him is the corpse of a female detective. In his hand is a gun. For some reason, the last several months are erased from his memory. D.

The detectives search Kiyoharu Yusa's home while investigating a robbery and Kaoru Usui's murder. What do they find? Does Kaoru's only son, Katsuki, help them find the missing answers?

The police department tries to pin Kaoru's murder and the billion-yen robbery on Honjo, a deceased detective. Kiyoharu and Nanbu are unconvinced and start their own investigation, which begins with tracking down a man named Saimon. ©NIPPON TV

When it's revealed that Nanbu is the criminal mastermind, Kiyoharu digs into his past to uncover the truth behind all the lies Nanbu has weaved. Meanwhile, Katsuki has evidence that could topple Nanbu's alibi. ©NIPPON TV

The existence of a shady underground organization called Nippon Noir is uncovered. Kiyoharu decides to face the darkness when an important memory comes back to him. ©NIPPON TV

Wanted nationwide, Detective Kiyoharu goes on the run from the police with Saimon. During the escape, Kiyoharu uncovers crucial information about the underground organization Nippon Noir. ©NIPPON TV