In order to protect her family, female general Shen Jinghan was forced to take the place of her sister who had escaped from marriage. She disguised herself as a man and became the consort of the sickly eldest princess Xie Yunshao. She originally wanted to use her identity to secretly investigate the mysterious case of military power, but she discovered that the princess who was rumored to be lingering on the sickbed was actually a scheming planner who pretended to be sick and weak. The two began to test and exploit each other. In the vortex of court intrigues, border wars, and secrets of the previous dynasty, they went from hostility to alliance, and then to the deep love of life and death. Shen Jinghan went from being a "stand-in" who just wanted to get away, to gradually becoming Xie Yunshao's sharpest edge and warmest home on his way to becoming the heir; Xie Yunshao helped Shen Jinghan wash away his grievances and break free from his shackles. In the end, they joined forces to quell the troubled times, Xie Yunshao ascended the throne as emperor, and Shen Jinghan was named king as a daughter, creating a legend that transcended gender and identity.