Cheng Ran was unexpectedly reborn and returned to the Central Conservatory of Music ten years ago.
Once he played "Loophole" carefully in a bar, he became popular on the Internet with this melody that subverted cognition, but he was also targeted by a mysterious organization.
This organization wants to use music to control humans, and is frantically searching for the "key" that can achieve this purpose.
But Cheng Ran soon discovered that the power of music goes far beyond that.
It can not only become a warm current that heals people's hearts, but also a sharp blade that transmits secret messages, and it also hides secrets that can shake the world.
In the pursuit of the forces of light and darkness, he must hold the keys in his hands tightly and find a way out in the maze of melody.
