Gu Yun Zheng --- Luo Yun Xi
He is young and promising, focused and resilient. He approaches his profession with meticulousness, caution, and attention to detail. In life, he also seeks romance and passion. During the aid mission in Africa, Gu Yunzheng coincidentally meets Su Weian, a young girl with an illness, and their initial clash leads to an unexpected connection. When Gu Yunzheng learns that Su Weian has lost hope in life due to carrying a rare disease gene, he uses his expertise and love to encourage and empower her. Faced with illness and the realization of the preciousness of limited time, he becomes a healer with a more compassionate heart.
Su Wei An --- Zhang Ruo Nan
A medical student carrying the rare gene for Huntington's Disease. Encouraged and supported by Gu Yun Zheng, Su Wei'an mustered the courage to confront the limited precious time of their own life and joined hands with Gu Yun Zheng in the research and conquest of Huntington's Disease. Despite facing setbacks, Su Wei'an remained steadfast in their original intention. After an accident occurred during an experiment, Su Wei'an passed away and donated their body for scientific research.
Du Yun Cheng --- Wei Qian Xiang
Gu Yun Zheng's half-brother, born from a different mother, appears gentle, considerate, and easygoing on the surface, but harbors significant ambitions internally. He believes that he should have been the eldest son of the Du family, but due to being born out of wedlock to Du Yong Song and Cui Jie, he has never received the attention of his grandfather and father. Du Yun Cheng works equally hard but lacks talent in medicine, so he had to give up becoming a doctor and instead invested himself in management and investment in pharmaceutical companies. He relied on the resources of his family and his own efforts to rise rapidly.
Jiang Mu Ying --- Wang Yi Ting
She is Su Wei An's high school classmate and longtime best friend. All the achievements she has obtained were due to Su Wei An's insistence. She lacks independence and has always been a follower, imitating Su Wei An's every move. When Su Wei An decided to become a doctor, she also wanted to become one. Due to her limited abilities, she could only pass the veterinary exam and barely graduated. Entrusted by Su Wei An's mother, she went to La Ka Ya to find Su Wei An, and over time, she developed feelings for Fang Mingfan. Despite facing practical differences, their genuine affection grew stronger amidst bickering and trivial matters.
Wen Ran --- Qian Di Di
She is Du Yun Cheng's girlfriend. Her father is a renowned expert in the field of Huntington's Disease. During their student days, she once plagiarized Su Wei An's paper and used dishonest means to hinder their relationship when Du Yun Cheng confessed his feelings to Su Wei An. These unethical actions were eventually exposed, and she faced the appropriate consequences. Despite having an accomplished father and the support of Du Yun Cheng, her character issues have cost her in terms of interpersonal relationships and her career.
Fang Ming Fan --- Li Jia Hao
He is Gu Yun Zheng's surgical assistant, a simple-minded optimist. He falls in love at first sight with Jiang Mu Ying, and although the process of pursuing her is full of laughter, it cannot hide his genuine and sincere affection. As a healthcare professional, he once experienced psychological trauma due to a surgical accident and fell into despair. However, he was inspired by Gu Yun Zheng to start anew. With the guidance and encouragement of Jiang Mu Ying and Gu Yun Zheng, he overcomes his shadows and gradually grows into a prominent young neurosurgeon.
Li Wan Tong --- Zhao Meng Shu
A Ph.D. in Psychology from Harvard University and a psychiatrist in the Department of Psychology at Hua Ren Hospital. They fall in love at first sight with Gu Yun Zheng and boldly pursue them.
