Mo Chengyuan was an unloved prince. An outing experience in his youth introduced him to Ouyang Fengshuang, who was physically ill. The two experienced a huge massacre together, which caused Ouyang Fengshuang to lose the memory of being with Mo Chengyuan, and he almost died from an illness. However, the condition was stabilized under the treatment of Dr. Wu who was hired by Mo Chengyuan.
In order to find medicine to treat Ouyang Fengshuang, Mo Chengyuan used his own body to test the medicine, and used blood as medicine for Ouyang Fengshuang.
After getting traces of the medicine that can eradicate Ouyang Fengshuang's symptoms, he went to the enemy country with Ouyang Fengshuang and Ouyang Fengshuang's eldest sister, second brother and third brother to seek medicine. On the way, they passed Nanfeng City and uncovered the shocking secret of Nanfeng City. Although they encountered many difficulties and tribulations, they were resolved one by one.
In the end, he succeeded in seeking medicine and found a good and suitable home for his sister Ouyang Fenglin.
