After her father’s death, a young woman suddenly becomes a debt-ridden baroness and realizes she has been reincarnated into a novel she once read. Using her knowledge of the story to pay off her debts, she enters a ducal household as the contract wife of a missing son, pretending to be his pregnant wife. She plans to enjoy the luxury for a few months and leave once her debts are settled—but then the husband who was never supposed to return suddenly comes back.