Despite the opposition of his family and friends, Neil befriends the brain-damaged boy newly-arrived in the neighborhood.
The main character is a boy who baits a severely retarded peer. He calls the boy "Dummy" and uses him as a subject of an English composition. His teacher naturally calls him on his cruelty and insists that he get to know the boy he calls Dummy. Comstock, the protagonist does and in so doing learns that that boy has a truckload of problems -- an autistic sister, a mother who works for crumbs in a bakery and no other adult or back up to be found.
Comstock has horrible parents. They compare him to the ghost of his dead brother, crab at him when he accepts his $2.00 allowance instead of demanding more (what a weird parental wish) and constantly hound and belittle him and his sister, Susie. Susie is the only character one can like. She accepts everyone including the boy called Dummy. Her stupid parents think the boy is dangerous and forbid her or Comstock to have any further contact with them. The mother mocks the boy and tells Susie he is bad. Susie laughs at the sheer madness of anyone thinking that boy is dangerous. The stupid mother slaps her and turns on Comstock, saying, "By rights, mister, I should have given that one to you." That mother belonged in the wastebasket.
The end was simply unfinished business. The boy called Dummy was accused of killing a little girl (that was never explained) and he is subsequently killed by folks who just have no sympathy for anyone whose just a tad different. As for Comstock, he suffers a mental breakdown and ends up in an institution. The story closes with Comstock saying that he needs a new chest because he thinks he outgrew his old one.
Now that I've provided you with this information, do you STILL want to read this?