Mayonaka no Super Car

Akiko and her 25-year old daughter Mizuki are best friends and are closer than most mother and daughters. Akiko feels that Mizuki is growing distant from her due to her new boyfriend and decides to seduce him.

Following the death of his wife from a plane crash, tax inspector Haruma is convinced that the tragedy was a premeditated crime. A number of clues connect him to a tax evader Murakumo, who is about to perform an evasion scheme of US$ 7 billion.

Akira Hamura likes mystery books. She is 34-years-old, single and works part-time at the Murder Bear Bookshop. She also works as a private investigator. While working on cases, she experiences unlucky and unexpected situations. Because of this, she is known as "The World's Most Unfortunate Private Investigator."

The drama is depicting the life and times in 17th and 18th century Japan during the rule of the eighth shogun, Tokugawa Yoshimune.