In her previous life, she and her brother Yi loved each other deeply, but due to some strange combination of circumstances, they missed each other's lives. A car accident meant goodbye forever, but was reborn. Because the love in her previous life was too deep and her obsession was too strong, she still retained the memory of her previous life and remembered her brother Yi. She, Ouyang Xue, the youngest tutor in the history of the medical school, was reborn in Hongnan Kingdom. Her mother died as soon as she was born, and she followed her master to study medicine and make poison in the snowy mountains. When she was 9 years old, she went to the capital of Hongnan Kingdom to find her father, the prime minister. At a palace feast, she actually met her brother Yi. Hongnan Kingdom, Seventh Prince, Nangong Yi......