Su Muyan, a rookie witch, is a descendant of the Beiliang witch clan. According to the contract between the royal family and the witch clan, she was betrothed to Feng Luochen, the ninth prince who was least valued but had a pure yang body, even though the three princesses that Feng Luochen had married before were missing and rumored to have died at the hands of Feng Luochen. In order to open her spiritual roots and rescue her beloved, the eighth prince Feng Qiyu, who was detained in Nanyang, Su Muyan started a "contract marriage" with the killer prince. With her messy witchcraft and serious sincerity, Su Muyan captured Feng Luochen step by step, gradually fell in love with him, and unraveled the many conspiracies surrounding him. Two people who were despised in their respective worlds redeemed each other. You called me to wake up, and I protected you to the top.