In the twenty-fifth year of the Republic of China, the Japanese army invaded China and dark clouds enveloped the north. A wealthy man from Shanghai {Su Qingyuan} went north to Tianjin for his family's coal business, and unexpectedly met the young marshal {Lu Chengze} who controlled the military power in Tianjin and Hebei. At first, they tested each other due to commercial interests, but in repeated confrontations, they glimpsed each other's patriotic enthusiasm - Su Qingyuan did not want the family business to become a tool for the Japanese invasion of China, while Lu Chengze secretly prepared to resist foreign enemies. The traitor warlord Zhao Qishan stood in the way, not only wanting to annex Lu Chengze's power, but also trying to force the Su family to cooperate. During the war in troubled times, the two fell in love and stayed together. Su Qingyuan used his code-breaking expertise to help Lu Chengze deliver military reports, while Lu Chengze protected the Su family from wind and rain. Amid warlords' melee and the crisis of their home and country, they protect love and plant the seeds of hope for the anti-Japanese cause.
