Detective Mitarai’s Casebook: The Clockwork Current (2016)

Private Detective Kiyoshi Mitarai (Hiroshi Tamaki) and Miyuki Ogawa (Alice Hirose) arrive in Fukuyama, Hiroshima Prefecture. They are interested in a case which involves discovered bodies. The bodies were found drifting in the Seto Inland Sea, where the currents repeat every 6 hours.