Yuchen, an ordinary white-collar worker in the city, is busy running around the company and home every day. Although he has imagined countless times that he can meet the perfect knight in black, he always misses the opportunity to get married. In the days when he was about to reach 30, he unexpectedly gained love. Unexpectedly, love was difficult, and two people who loved each other deeply could not walk away because of a thread... Yuchen decided to wander on the seaside where he had dated many times with his lover for the last time. Who knew that when he woke up, he found that he had traveled to the distant Ming Dynasty, and what surprised him even more was that after traveling, Yuchen turned out to be a man...