Dagwood is hired on a construction crew raising a new office building. After stumbling through several careless mishaps and pratfalls while handling construction materials, he overhears a foreman order a workman to patch a badly cracked steel girder rather than replace it. Racing to a pay telephone, Dagwood calls Blondie and asks her to contact the property's owner, who unfortunately has an unlisted phone number. The owner is finally located and races to the site in time to fire the foreman and give Dagwood a major promotion.
