志在维护正统的西汉士大夫公明（井柏然饰），偶然间发现自己可以自由穿梭于千年时光之中，并在一次次的时光穿梭中，与不得志的现代女演员林湘湘展开了一场跨越千年的“甜蜜虐恋”。

电影《为国而歌》以人民音乐家聂耳成长并创作《义勇军进行曲》为主线，讲述了一群心系祖国命运的文化英雄，用热血谱写出中华民族最强音《义勇军进行曲》的故事。

A story of three couples and their intertwining love stories set in 1940s Taiwan and Shanghai, centered around the 1949 sinking of Taiping.

A group of close friends who attend a private school all have a debilitating crush on the sunny star pupil, Shen Chia-yi. The only member of the group who claims not to is Ko Ching-teng, but he ends up loving her as well.

At the end of the World War II and the middle of the Chinese Revolution, three couples from different backgrounds with different nationalities flee from China to the island of Taiwan.