Mystery Note III was first broadcasted in South Korea in 2013 by South Korean television station SSS. The drama was about a smart and quick-witted college student, Jin Yu, who worked with a mysterious detective to find the murderer of his parents. The two of them started a series of bizarre murders together. In the play, Jin Yu and the detective gradually uncovered the truth of a series of murder cases by analyzing clues and deducing the truth. At the same time, they also discovered the secrets hidden in their hearts. The whole story was full of ups and downs, making the audience feel the charm of a mystery novel. The show was well-received by the audience. Not only did it achieve high ratings in Korea, but it also attracted widespread attention and discussion in China and other countries.