Little Mugg, Big Mugg and Ugly Mugg are the Monster Muggs, troll-like creatures about three feet tall. They're unhappy because their cave home is cold and windy and so they decide to find a new home. They try a castle but the bats, mice, spiders andspooks are too scary. Next they try the barn but are scared off by the cows and geese. Then they decide to move into the school - scaring the children away first. But the children are not afraid of the Monster Muggs instead the Monster Muggs are terrified of them! They flee from the pursuing children and hide in a giant rubbish bin, dark and warm inside and the perfect home.