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....
维京岛国的少年小嗝嗝（杰伊•巴鲁切尔 Jay Baruchel 配音）是部落统领伟大的斯托里克（杰拉德·巴特勒 Gerard Butler 配音）的儿子，他非常想像自己的父亲一样亲手屠龙——这些飞龙是岛上维京人放牧羊群的主要天敌——但他每次出现在部落屠龙的战斗中都只给大家徒增烦恼。在一次对抗飞龙的战斗中，希卡普偷偷用射龙器击伤了一只最神秘的“夜之怒龙”，并背着族人放生、豢养，甚至驯服了这只龙，还给它起名“无牙”。希卡普的神秘行径引起了一同训练屠龙技巧的女孩阿斯特丽德（亚美莉卡·费雷拉 America Ferrera 配音）的怀疑。阿斯特丽德发现了希卡普的秘密，却同时被身骑“无牙”御风而飞的美妙体验所震撼。格雷决定在屠龙成人礼上向远征归来的斯托里克和族人讲明真相，说服大家放弃屠龙，却偏偏弄巧成拙，害得“无牙”被俘，一场更大的灾难就在眼前……...
