After the tragic death of his father, thirteen-year-old Benny Oh begins to hear voices. The voices belong to the things in his house and sound variously pleasant, angry or sad. Then his mother develops a hoarding problem, and the voices grow more clamorous. When ignoring them doesn't work, Benny seeks refuge in the silence of a large public library. There he meets a mesmerising street artist with a smug pet ferret; a homeless philosopher-poet who encourages him to find his own voice amongst the many; and his very own Book, who narrates Benny's life and teaches him to listen to the things that truly matter.