Serena Vaughn transmigrates and becomes the true heiress who was switched at birth. She outsmarts the false heiress. The Crown Prince, Chu Chengyuan, is drawn to her demeanor and proposes marriage. After their marriage, she uncovers and thwarts conspiracies against the Crown Prince. The wrongdoers receive their punishment. After Chu Chengyuan ascends the throne, the couple works together to create a prosperous era.