The play tells the secrets of a woman who can only fall asleep by listening to the incomplete singing, the true reproduction of the horrible murder buried in the woman\’s lost memory, and the unique suspenseful love story of rediscovering the traces of love. Yan Yuzhen plays Zheng Yun. He is a mystery idiot and a guest pianist of the Heqiao City Symphony Orchestra. He is an excellent wayward and unrestrained person who is loyal to his own feelings. He does not care about rumors and the sight of others. His piano performance is very beautiful, and he can instantly catch the conductor\’s heart. Jin Shizheng plays the role of Hong Yiying, a subsidized timpani drummer and unemployed student from the Heqiao Municipal Symphony Orchestra. She has a quiet and ordinary appearance. She is a timpani drummer who suffers from insomnia and nightmares. She can\’t even fall asleep without sleeping pills. Song Zai Lin will play Nam Joo Wan in the play. He is an associate professor in the Department of Music and a conductor of the Municipal Symphony Orchestra. He is a cute and charming character with an artist temperament. Park Ji Yeon plays Ha Eun Joo, who is the second violinist of Ha Qiao City Symphony Orchestra and a college classmate of the heroine. She is sexy and hot and is a cheerful and lively \”Queen of Life\”. She knows the past of Nam Joo Wan (Song Jae-rin) and the true face of Jeong Yun (Yeon Woo Jin).