Araki Murashige (Motoki) rebels against the tyrannical methods of Oda Nobunaga and launches a siege. The castle is surrounded by Oda forces, leaving him isolated and helpless. While keeping the hotheaded retainers in check, Murashige struggles to protect the castle and its people with the emotional support of his wife, Chiyoho (Yoshitaka Yuriko). One day, a young boy is murdered within the castle. After that, a series of mysterious incidents occur. The suspect is a retainer or family member inside the castle, which has become a locked room. Outside the castle are enemy forces. Inside the castle are traitors. As everyone becomes increasingly suspicious, Murashige attempts to solve the mystery with the help of Kuroda Kanbei (Suda), a dangerous and brilliant military strategist imprisoned in prison. What is the shocking truth behind the incident?

某公司年轻社长天野（柄本佑 饰）在下属（森下じんせい 饰）的陪同下视察某港湾基地，他的父亲早就有吞并该港湾的雄心，如今随着“美丽新湾计划”的启动，天野的公司积极备战，势在必得。只不过这位新任社长显然缺乏干劲，虽然被下属誉为处在公司中央位置的最大最重要的齿轮，但他也没有任何的自豪感。视察当天，天野的注意力被一个名叫古川高子（三田真央 饰）所吸引。此后的日子里，他时常借故跑出公司，来到港湾工地，试图接近高子赢得对方的好感。他自以为是、自高自大的做法引来高子的不快，而天野的突然之举也引发了连番的混乱……

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.

2004年，34岁的松本朔太郎（绪形直人 饰）收到高中老师寄来的明信片，将他封闭且逃避了17年的记忆带回到17岁的那个夏天。1987年。高中时代的朔太郎（山田孝之 饰）和广濑亚纪（绫濑遥 饰）的恋爱非常甜蜜，对两人来说快乐的瞬间感觉就像永远一样。自从亚纪得了不治之症后，两人的命运发生了急转弯。虽然亚纪在努力对抗病魔，但现实毕竟是残酷的，在朔要带亚纪去澳大利亚乌鲁鲁的时候，亚纪却在机场晕倒了。虽然这是无法改变的事实，但失去亚纪让朔太郎对于人生、爱情产生了永久的失落感。“我17岁时，在没有她的世界。”17年后，朔太郎是否能找到那把走出迷宫的钥匙？可以亲手送走了一直弥留在自己心中的亚纪吗？

本作品以日本的美丽风景为舞台，讲述了丈夫驾驶妻子的爱车追寻心灵旅程的故事。因事故失去妻子美奈子(尾野真千子饰)的莲见希久夫(泷藤贤一饰)，知道了她的爱车“grace”上只留下了远离日常生活的地方的履历。希久夫怀疑妻子不贞，为了解开谜团踏上了旅程。他每到一个地方就会挖掘自己尘封的过去，也会触及美奈子的想法。