The orphan Yunya spent all her savings in the countryside to save Pei Zhiyan, who had lost his memory. The two fell in love with each other and made an engagement. After Pei Zhiyan regained his memory, he took Yunya back to Pei Mansion in the capital. Pei's mother disliked Yunya's humble background, and Pei Zhiyan also acquiesced in marrying another cousin and only accepted Yunya as his concubine. Yunya, who was sober and decisive, was not willing to be a concubine and asked for 500 taels of medical expenses before leaving. After returning to his hometown, Yunya spent twenty taels to buy the sold slave Ajiang. Ajiang takes care of the housework and takes great care of Yunya, and the two gradually fall in love. Soon the killer strikes, and Ajiang shows off his martial arts skills, revealing his true identity as Wei Zhao, the marquis of Wei who was assassinated by a traitor. Wei Zhao confessed everything to Yunya and took her back to Qingzhou
