After transmigrating into a useless young heir, he becomes a legend with his own BGM. Xie Zhixian, a modern young man, unexpectedly transmigrates into the notorious heir of a marquis's residence in the Great Qing Dynasty and binds himself to a BGM System that randomly plays music at any time. From household power struggles in the marquis's residence to the battle among five princes for the throne, he uses modern thinking and one outrageous BGM after another to overcome every crisis. Along the way, he befriends the composed Fourth Prince, Zhou Cheng'an, and Wu Wanrou, the daughter of the Marquis of Zhenhai, whose martial prowess is extraordinary. Once mocked by everyone as a good-for-nothing heir, he ultimately suppresses a rebellion, earns great merit, becomes the top imperial examination scholar, and wins the beauty's heart. His life truly comes with its own BGM.