"The Destructors" is about a group of teenage boys who call themselves the Wormsley Common gang, after the area where they live. They meet every day in a parking lot near a part of town that was bombed during World War II. Almost everything in this area is destroyed although one house stands with minimal damage. This house is owned by Mr. Thomas (whom the boys call Old Misery), an old man who lives alone.

One day, the gang's leader, Blackie, suggests that they spend the day sneaking free bus rides. T. (whose full name is Trevor) has another idea. He has been inside Mr. Thomas's house and suggests that the boys take advantage of the old man's upcoming two-day absence to demolish the house from the inside. T. becomes the gang's new leader.

When the boys meet at the appointed time the next morning, T...