The narrator just read an article in the newspaper that his brother, Sonny was arrested for selling and possessing heroine. He looks at his students afraid that they could possibly follow in his brother's footsteps.
Even though Sonny is in jail, the narrator does not contact him, until his daughter, (Sonny's niece) Grace, dies.
Sonny, who is now out of jail, has formed a new relationship with his brother, who welcomes him into his home with open arms.
After Grace's funeral, the brother's discuss Sonny's plans for the future, where he mentions his dreams of becoming a jazz pianist.
Sonny is putting all of his focus into playing the piano, even if it means skipping classes to do so.
After Sonny returns form serving in the Navy, the two brothers meet after some time has past.
The narrator realizes that Sonny takes all of his emotions and problems going on in his life and puts them into his piano playing. He is relieved that his brother has a way to escape from his troubles, if only for a short time.