伊森（汤姆·克鲁斯 Tom Cruise 饰）曾是任职于特殊部门的秘密特工，自从一位名叫茱莉亚（米歇尔·莫娜汉 Michelle Monaghan 饰）的美丽女子出现在他的生命里后，伊森决定金盆洗手，卸甲归田。遗憾的是，好景不长，幸福的生活还没过多久，伊森便接到了徒弟林德赛（凯丽·拉塞尔 Keri Russell 饰）被死对头戴维恩（菲利普·塞默·霍夫曼 Philip Seymour Hoffman 饰）掳走的消息。戴维恩冷酷又凶残，林德赛落入他的手中可谓是凶多吉少。

The winter of 1917, the North-East front, the final clashes of the Great War. An Italian stronghold situated at 1800 metres above sea level, on the Asiago plateau, described in the novels of Mario Rigoni Stern. It’s snowing everywhere; the Austrian trenches are so close that you can hear the enemy soldiers breathing. A hundred years since the outbreak of World War I, maestro Ermanno Olmi describes with Torneranno i prati his vision of a conflict that cost the lives of 16 million human beings, just as it was brought back to him by the memory of his father, called to arms at 19 years of age, to find himself within the bloodbath of Carso and Piave. A drama that scarred his youth and the rest of his life, just like millions of others.

霍金（埃迪·雷德梅恩 Eddie Redmayne 饰）和简（菲丽希缇·琼斯 Felicity Jones 饰）相识于一场舞会上，两人初次见面交谈甚欢，颇有一番相见恨晚的意味。之后，霍金大胆的邀请简参加舞会，二人以此为契机，陷入了热恋之中。