Kyôtarô Nishimura's Travel Mystery 18 (1990)

The famous serial and novel-based adaptation continues with this case. There is a murder in the Izu Peninsula area of Western Japan. There is a case of a university girl disappearing in the northern territory of Hokkaido at the same time. The two relevant police set out to solve the respective cases. Despite the disparate geographies and initial assumptions the two seemingly distinct cases are connected. It is the job of the detectives to stitch things together.