Gu Yunzheng, an associate professor of neurosurgery, met Su Wei'an, a "deserter" who abandoned medicine and business, when he was on a medical assistance mission in Lakaya, and the two went from happy enemies to mutual affection, and he gradually discovered that all her abnormal behavior stemmed from the fact that she carried the gene that causes Huntington's disease. Gu Yunzheng decided to give up his bright future and devote his life to the research of curing this rare disease, and carve out a light in the darkness side by side with his lover.