The Lost Thing is a humorous story about a boy who discovers a bizarre-looking creature while out collecting bottle-tops at the beach. Having guessed that it is lost, he tries to find out who owns it or where it belongs, but the problem is met with indifference by everyone else, who barely notice its existence. Strangers, friends, parents are all unwilling to entertain this uninvited interruption to day-to-day life. In spite of his own reservations, the boy feels sorry for this hapless creature, and attempts to find out where it belongs.