She is the eldest lady of Sujiabao, cheerful and lively, but she always has a cold expression in front of her father. No one knows her well. They all know that she has martial arts, but they don't know that her martial arts is so high that she is one of the best in the world. She also worshiped the King of Poisons as her teacher. Instead of harming people with poison, she used poison to save people. She didn't want to be anyone's tool, so she chose to escape from marriage. She was kind-hearted and married in place of the bride in order to make a couple happy. On the way to get married, will there be a spark of love with him, the groom who has been protecting her? As for her childhood sweetheart, when she was about to hold her wedding, he realized that he did not regard her as a brother, but the person he loved most in his life. He wants her to stay with him forever...