坎城影展坎城首映單元正式入選

荒木村重（本木雅弘 飾）為了反抗暴虐無道的織田信長，決意展開籠城戰。眼看城堡隨即遭到織田軍重重包圍，整座城陷入孤立無援的境地。在戰國亂世之中，村重是一位堅守「不濫殺無辜信念」的武將。他的妻子千代保（吉高由里子 飾）是他最重要的心靈支柱，此刻也為了守護城堡與百姓而苦心竭慮。然而就在此時，城內卻發生了一起少年慘遭殺害的事件，緊接著，離奇詭異的案件接二連三地發生。嫌疑犯無疑是藏在這座宛如「密室」的城堡中，某個家臣或身邊的親信。城外是敵軍、城內是叛徒，在眾人皆陷入疑神疑鬼、草木皆兵之際，村重決定與被囚禁於地牢之中、危險卻聰穎過人的「天才軍師」黑田官兵衛（菅田將暉 飾）聯手，共同挑戰並解開這一連串的謎團。令人震驚的事件真相，以及村重最終做出的決斷究竟是……。

Provincial lord of the Arioka Castle, Murashige Araki, rebels against tyrannical despot Oda Nobunaga, and makes a stand at his stronghold castle. He decides to take siege but is subsequently surrounded by Oda's forces, leaving its denizens isolated and in need of allies. With the sensitive support of his wife Chiyoho, Murashige struggles to keep his hot-blooded retainers in check, while also protecting the castle and its people. One day, a young samurai is murdered within the fortress with the mysterious killer unknown. A succession of bizarre incidents follows. The suspects are Murashige's close retainers and the people inside the Arioka Castle's land. Outside, enemy troops lie in wait. Inside, traitors lie to conceal themselves. As suspicion runs rampant, Murashige seeks the help of a prisoner in his dungeon—dangerous master tactician Kanbei Kuroda—to solve the mysteries.