Based on the exciting feature-length video, The Knights of Can-a-Lot, this storybook retells the adventures of Bob and his team when they renovate an old castle. Tales of the Knights of Camelot inspire Bob's noble team of machines - Sir Dig-a-lot, Sir Lift-a-lot, Lady Mix-a-lot, Lady Dump-a-lot and Sir Roll-a-lot in their own 'medieval' adventure.