When Major Clanger decides that the Soup Dragon must be fed-up with dishing up soup for them all every day, he invents a machine to collect the soup instead. But when he takes some soup without even asking the Soup Dragon, he overfills the machine and it gets stuck in the doorway. Only with the help of the Soup Dragon can it be freed, and as it is freed, it explodes everywhere. Perhaps sometimes it is best to leave things as they always were.