Kyoji Noguchi

Three stories from Shiratsuna Island: "Mikan no hana" Shiratsuna Island is the only remaining island city in Japan, but it is being merged with a city on the opposite shore. Housewife Misato Tomita lives on the island. "Umi no hoshi" Yōhei Hamasaki, who was born on Shiratsuna Island, lives in an apartment in the outskirts of Tokyo with his wife, Tomomi, and their son, Taichi. "Kumo no ito" Popular artist Hirotaka Kurosaki, who is a native of Shiratsuna Island, goes back to his hometown after seven years.

東京近郊でひき逃げ事件が発生。死体には頭部を殴打されたあとがあり、被害者に3億円の保険金をかけていた妻、法子と愛人の塚田に殺人容疑がかけられる。しかし完璧なアリバイがある2人に、刑事の響も探偵の河野も翻弄され…。