In the winter of the 28th year of the Republic of China, Shanghai was covered with wind and snow.
After Zhonglie, Shen Zhiyi put down his paintings and stepped into the headquarters of Wang Puppet Agent.
In order to complete her latent mission, she pretended to betray her comrades and was willing to be called a traitor. She was reviled by the whole city and alienated from her relatives. No one knows about her forbearance and sacrifice. Only an old pocket watch, hiding the ten-year marriage contract made by her father, is her only thought in the dark night.
Within Wang Puppet's high walls, there was always someone staring at her with a pair of cold eyes. The man who wears a dark gray suit all year round is not a traitor, but a secret agent of the Kuomintang lurking here, who hates the Japanese invaders to the core. But unfortunately, he felt a sincerity toward her who was covered with stigma that he should never have.
The chubby boy in her pocket watch as a child, her fiancé whom she has never met again, is now the head of the largest cotton mill in Shanghai, saving the country through industry and keeping a firework.
In the chaotic world, they looked at each other from a distance, unaware of each other.
A hidden blade, a heart to save the country, a misplaced love, and an unfulfilled engagement. Mountains and rivers are swaying, the thin line between life and death, and two hidden threads of fate have trapped several people in the torrent of this era for the rest of their lives.