Medical student Lin Wei traveled to Chang'an of the Tang Dynasty and was rescued by Pei Xuan when she was in danger for the first time. As the leader of the secret guard, Pei Xuan suffered from a chronic illness. Lin Wei treated him with modern medical skills, and the two gradually fell in love.
There was an undercurrent of strife among the Chang'an aristocratic families, and the Liu, Cui, Lu, Wei and other families all had their own agendas. Lin Wei was involved in it because of her relationship with Pei Xuan, and was framed repeatedly.
She relied on her medical skills to open the Huichun Hall in Chang'an, where she not only saved lives and healed the wounded, but also joined hands with Pei Xuan to fight against the family's conspiracy during crises such as the epidemic. After many twists and turns, they smashed the conspiracy of the family alliance and shook the old power structure. In the end, Lin Wei chose to take root in the Tang Dynasty, guard Chang'an with Pei Xuan, and witness the formation of the new structure of the family.