Kosaku Kuroda (Yuji Oda) returns to Japan after 11 years to investigate the death of Tsuyoshi Shimomura (Teruyuki Kagawa), a murder suspect who committed suicide in San Francisco. Kuroda's swift return was arranged by his superior, Yosuke Ando (Takeshi Kaga), the head of the Japanese Citizen Anti-Terrorism Office. However, the move is also influenced by Vice Minister of Foreign Affairs, Shoko Kanjo (Tamiyo Kusakari), who wants to closely observe their actions.
