一曲《黄河大合唱》家喻户晓，而音乐家冼星海为了创作、背井离乡的艰辛岁月却鲜为人知。1941年，冼星海接受中共中央秘密派遣，化名“黄训”前往莫斯科。恰逢卫国战争爆发，冼星海不幸流落至阿拉木图。在举目无亲、贫病交加之际，冼星海得到了哈萨克斯坦音乐家拜卡达莫夫及其姐姐一家的无私救助，更是与小卡丽亚情同父女。在极其困苦的战争环境下，冼星海与哈萨克斯坦当地的音乐家坚持创作、甘苦与共。此期间，他创作并修改了《黄河大合唱》、《神圣之战》、《阿曼盖尔达》等经典作品，用音乐治愈了无家可归的心灵，激励人们为抗击法西斯而战。就在胜利号角吹响的时刻，年仅40岁的冼星海不幸病逝于莫斯科……

The film follows the true life story of one of China's greatest composers, Xian Xinghai. The start of the Soviet Union's Great Patriotic War against Nazi Germany in 1941 made it difficult for Xian to return to China. He was stranded in Almaty, suffering poverty and sickness. Kazakh composer Bakhitzhan Baykadamov then helped Xian, providing him with a home, despite not knowing his true identity since Xian was then using an alias. There Xian put down roots and composed some of his most famous works.