The master of surgery transforms into a down-and-out concubine. Shen Xinglan uses her medical skills to overcome the trap framed by her aunt, and follows the King of Jingbei, Xiao Heng, to the northern battlefield. She saved him from being poisoned and was about to die, and he protected her from the siege of thousands of troops. There was a secret love between medical skills and power tactics. However, he fell into a crisis of trust due to the secret of his life experience and suspicion of imperial power. When the conspiracy was completely shattered, he used the mountains and rivers as his employer: "You protect the common people, and I will protect you." The two strong men went through troubled times together, sweetness and cruelty intertwined with blood, fire and deep love.
