Shen Wu, the ugly daughter of a general, was forced to marry Gu Qing, a well-known "waste" son-in-law in the city, instead because her twin sister Shen Fu escaped from marriage. After the marriage, Shen Wu was regarded as an outcast by the Shen family and was looked down upon. Only Gu Qing treated her warmly and sincerely. By chance, Shen Wu discovered that Gu Qing had unfathomable skills, and Gu Qing also discovered that Shen Wu was not the idiot he was rumored to be, but was proficient in strange medical skills. The two of them each have their own secrets, and they develop a secret love while protecting each other and testing each other.
Mid-term: Shen Fu returns, wanting to take back everything, and spreads rumors to prove Shen Wu's reputation as a "substitute" and "ugly woman". The Shen family colluded with hostile forces, and Gu Qing, in order to protect his wife, began to gradually show his talents and resolve crisis after crisis. With his medical skills and resourcefulness, Shen Wu not only cleared away the stigma, but also gained popularity among the people. A misunderstanding about the stand-in triggered an identity crisis, but also forced the two to join forces, and the truth and life experience gradually emerged.
Later period: It turns out that Shen Wu was the orphan of the former royal family who was swapped, and he was carrying the secret of the treasure to restore the country; while Gu Qing was the hidden guard commander who was secretly trained by the current emperor and was responsible for retrieving the orphan and the treasure. The two changed from a "surrogate couple" to a "destined bond", fighting side by side in the intrigues of the court and the turmoil in the world. Shen Wu's appearance transformed as his heart knot was untied and his body recovered, and Gu Qing's "husband-in-law" mask was completely taken off. They smashed the conspiracy, settled the troubled times, and turned the misplaced substitute life into a unique legend.
