Set in 15th century China, this is the story of Tan Yunxian, a remarkable woman who was schooled by her grandparents from a young age as a doctor. She loses her mother when she is a girl, marries into a successful family at 15, and grows in medical knowledge and skill throughout her life. We follow the seasons of her life, through difficulty and success, as she builds relationships with the women around her. Very interesting historical fiction.