During the peaceful Daming Dynasty, Yuan Mo, a commoner from Changle City, encounters A Shu, a refugee from the Yanle Kingdom attempts to sneak in at the city gates. This conflict leads to Wang Kunwu being punished for failing to oversee his duties as a border general. As a consequence, Yuan Mo is inadvertently pulled into the Four Square Pavilion, where he forms a team with A Shu, Wang Kunwu, and Yuchi Hua. Together, they confront complex diplomatic challenges in their quest for justice and patriotism.
The two amnesiac youths, Yue Jinzhao and Yue Qi, have been wandering the land in search of their identities and pasts, only for Yue Qi to lose all of her money to a member of the Risen Soul Cult. In the process of trying to recover the lost money, they meet up with Luo Zhouyan, the head of the "Evanescent" Luo family who is spearheading efforts in her region to destroy the cult and expose its crimes. As the Yue siblings and Luo Zhaoyan join forces with each other and members of the True Martial Alliance: Ju Shifang, Ming Xin, and her uncle Xian Qing, to root out the leaders of the cult while overcoming their personal demons and finding out about the mysterious organizations operating in the shadows.
The queen of the human tribe gave birth to twin girls. Respected by the entire tribe, the older sister Qing Kui, who is gentle and kind, is betrothed to the heavenly prince. The younger sister, Ye Tan, smart and cunning, shunned by her own people, is betrothed to the demon prince. Due to a mix-up, the two sisters are married off to the wrong husbands. It paves the way for two beautiful romances and also ignites a conspiracy that shakes the four realms.