Cartoon adventures of builder Bob and his friends, Travis the tractor, Scoop the bulldozer, Lofty the crane and Dizzy the cement mixer. Mr and Mrs Bentley are moving house and Bob is carrying out a loft conversion at their new home. However, the removal company call to say that they have several staff off with flu, so they won't be able to move the Bentleys' belongings. Wendy saves the day by suggesting that she and the machines bring the furniture while Bob works on the loft.