Zuo Qing Ci, the son of a Marquis, disguises himself as a traveling doctor while secretly searching for a powerful scroll known as the Mountain River Painting. During his journey, he crosses paths with Fei Kou Er, a clever bandit who is actually Su Yun Luo, a noblewoman from Zhengyang Palace hiding her true identity.

When Su Yun Luo's secret is exposed, the two become targets of a dangerous plot. Framed by the cunning Wei Ning Hou, they find themselves caught in a web of political intrigue. As they uncover buried secrets and face growing threats, Zuo Qing Ci and Su Yun Luo fight side by side — not just for justice, but for each other. Together, they must protect their love and their country from the shadows closing in.