Joey is the middle son, Black and 17. His older brother Paul, his mother's pet, has just returned from 7 months at a rehab center trying to overcome his heroin addiction. His younger brother Davey is a brilliant high school junior with exceptional talent as a basketball player. Their mother seems to only care for Paul even though he is back on heroin within days. Joey decides to give Davey the money had saved to go to college himself and join the Navy. Paul finds the money and spends it on heroin. Joey goes to get it back from the dealer. In the fight that ensues, Davey saves Joey from getting shot by one of the guys in the other gang and gets killed himself.
This book has an unsettling and powerful ending, but the beginning drags some. "Listen for the Fig Tree" by Mathis is much better in my opinion. "Teacup" has a message - it portrays the agony of drug addiction, and the waste of the good and beautiful in the ghetto, but it is not as forceful a statement as her later book.