Rong Zhiyan, a wealthy businessman in Beicheng and a talented architect, learned that she had been arranged for a business marriage after returning from a business trip. Although she was reluctant, she chose to accept it, but on the wedding day she discovered that the groom was actually Yi Chenze, her first love who had been abandoned seven years ago. Back then, she fell in love with Yi Chenze, who was a recommended student of Qing Dynasty University, and broke up cruelly because of revenge on Yi Chenze's mother, Yi Wan'er. Yi Chenze was actually the illegitimate son of the He family in Nancheng. He returned to the He family through marriage, and because the marriage partner was Rong Zhiyan, Yi Chenze showed his resentment in the past and acted "trickly" on the surface, but secretly protected him everywhere. Rong Zhiyan resisted at first, but gradually became shaken through repeated interactions, misunderstandings and shared experiences.