Mikoto Misumi is a pathologist at UDI (Unnatural Death Investigation) Lab. She can't stand neglecting unnatural deaths and believes there must be a truth behind the deaths. Team members that work with her are autopsy doctor Kai Nakado, recorder Rokuro Kube, clinical test technologist Yuko Shoji and UDI director Yasuo Kamikura. They work on unnatural death cases and try to reveal the truth behind the deaths.

Maki Maki, Sebuki Suzume, Beppu Tsukasa and Iemori Yutaka happen to meet and form a quartet. They even begin to live together in Karuizawa during the winter, but there is a big hidden secret.

Towards the Republic, also known as For the Sake of the Republic and Zou Xiang Gong He, is a Chinese historical television series first broadcast on CCTV in China from April to May 2003. The series is based on events that occurred in China between the late 19th century and early 20th century that led to the collapse of the Qing Dynasty and the founding of the Republic of China. Owing to its portrayal of historical issues deemed politically sensitive by the Chinese government, the series has been subject to censorship in mainland China.