Adapted from the classical 14th century novel of the same title by Luo Guanzhong, Romance of the Three Kingdoms is part historical, part legend, and part mythical – romanticises and dramatises the lives of feudal lords and their retainers, who tried to replace the dwindling Han dynasty or restore it. The focus is mainly on the three power blocs that emerged from the remnants of the Han dynasty, and would eventually form the three states of Cao Wei, Shu Han, and Eastern Wu.

Xu Si, an investment professional who moves back to mainland China from a Hong Kong investment bank, meets Jiang Hu, the only daughter of the chairman of a national clothing conglomerate. Due to their differing business philosophies, the two are at odds with each other. When Jiang Hu's father's company suddenly goes bankrupt, she finds herself plummeting from the heights of success. Meanwhile, Xu Si, who has always been ambitious, sets his sights on the rubber-soled shoe brand "Tengyue," which was once created by Jiang Hu's father. Determined to save "Tengyue" at all costs, Jiang Hu, despite her downfall, engages in a fierce battle with Xu Si. Ultimately, their interactions and struggles will determine the fate of "Tengyue" and whether it can be revived.

It tells the story of Dongfang Huaizhu and Wangquan Hongye, the leaders of two major families, the Dongfangs and the Wangquans. In a time when humans and demons are in conflict, they work together to stabilize the situation in order to revive the Unity Alliance. On the seventh day of the seventh month, at the Bamboo Pavilion by the Huai River, their fates intertwine like the sheaths of two swords, never to be separated. They pick up the most heartwarming promise and tell a story that has endured for generations.