She was an abandoned child poisoned to death in the bridal chamber. After rebirth, disguised as a man, she kills her way back to the Imperial Medical Academy, counterattacking all the way from the humblest medicine slave to the Empress Dowager's adopted daughter and Great Yan's first female medical official. The man who handed her the poisoned wine in her previous life kneels in the rain in this life begging her to take his life, and she does not even look back. But when he blocks a hidden blade and falls bleeding, she discovers—some hatred is no longer hatred. Yet a bigger conspiracy has just begun: who is manipulating everything behind the scenes? Behind the cause of her parents' death, what astonishing secret is still hidden?