Undercurrents surged in the Great Yin Dynasty, and the medical girl Mu Chenyue suffered a tragedy. The whole family died in the palace power struggle because they were involved in the emperor's secret case of unraveling poison. She was lucky enough to survive, and she found clues based on the killer's words. In order to avenge the blood and investigate the truth thoroughly, she resolutely disguised herself as a man and sneaked into the palace.
Deep inside the palace, the Emperor Yin Yi she saw turned out to be a seemingly weak and incompetent puppet who could be manipulated by others: Inside, there was the Queen Mother who listened to the government behind the curtain and held real power. Outside, there was the general Qin Xiao who respected his troops and was eyeing him. He was also possessed by a strange poison, and his life was hanging by a thread. Mu Chenyue disguised his identity to secretly investigate old cases, while using his superb medical knowledge to cure Yin Yi's life. In the thrilling dealings step by step, the two gradually glimpsed the sincerity and edge under each other's disguises, the temptation gradually disappeared, and trust gradually grew.
As the investigation deepens, she is shocked to realize that the deaths of her family members are the victims of the Queen Mother's power-hungry conspiracy and Qin Xiao's obsession with revenge. The court is treacherous and people's hearts are unpredictable. She has gone through the heartbreaking ordeals of losing her virginity, losing her son, turning her hair gray, and being disfigured, but she has never changed her original intention. With her thorough medical knowledge and extraordinary resourcefulness, she planned a "five-step world" for Yin Yi and helped him regain the imperial power step by step; using her benevolence as a blade, she exposed the Queen Mother's treacherous tricks and disintegrated Qin Xiao's rebel forces.
From mutual temptation to life-and-death support, from family feuds to family and country justice, Mu Chenyue and Yin Yi work together to overthrow the traitors and bring peace to the troubled times in the whirlpool of intrigues and tests of life and death. When the poison was removed and the world returned to peace, the lovers who had experienced the same disaster finally made a promise to stay together for the rest of their lives on the devastated country.
Purpose: to use medicine as a blade to defeat the obsession with power, to use love as a shield to guard sincerity, to interpret the two-way pursuit of personal grievances and the righteousness of the family and the country in troubled times, and to highlight the brilliance of human nature that does not change its true heart in desperate situations.