William has a four-year-old sister, adorable Mary. Mary came up with an imaginary Lamb, and William, to spite her, decided to have wolves. But wolves are wolves: they scare Mary, spoil the flower beds in the garden, attack the school bully and strict teachers. From the parents all you hear is a continuous “stop this disgrace” and not a word about what a rich imagination William has. But William just wanted to get rid of the nasty, spoiled Lamb.