In this world, everyone can sing. However, sometimes we cannot hear what we sing due to the outside noise. "Who is singing there" is a story about a boy Mu Ji, who is in third grade of primary school. He is often able to hear songs that others can not. He also has unique understanding for the surroundings. Under his mother's strict control, he tends to live in his own isolated world. Later, he experienced a series of unexpected things and finally hear the most beautiful songs from his deep soul .... "Who is singing there" is written by Xie Hua, who devoted many years in this book. Let's see who is singing there!