Modern girl Su Nian transmigrates into a Republic-era novel, becoming a maid in the Governor's Mansion. Familiar with the plot, she knows that the adopted son Chu Zhaoyan is actually an undercover agent planted by hostile warlords. Unexpectedly, Governor Chu Zhenshan and Madame Lin Wanshu can hear her inner voice. Using this, the couple defuses crises one after another. The true young master Chu Wangjiang, who had been displaced, is found and is upright and resilient. After Chu Zhaoyan's conspiracy is exposed, he becomes desperate, forging a secret letter to frame Su Nian, but is publicly debunked by Chu Zhenshan. Trusted aide Wang Jin turns traitor and exposes the full truth, exposing Chu Zhaoyan's undercover identity. The Chu family pulls together to protect the citizens of the provincial capital and the family foundation.