Lum has the blueprints of the new house he plans to build for a family in need. He has some trouble telling Abner about them, and how the blueprints are used in construction. He’s not entirely pleased with the floorplan, and draws in his own adjustments.
Soon the small adjustment leads to adding a room, and discovering that part of the house will then be in the street. Will the additions run into more lumber than Lum counted on? His plans to get a deal on his carpenters and lumber depend on the widow who owns the land not getting along, and not talking to each other.
Wanting to know more details about the house to be built on her property, the widow Cobb phones Lum to get technical details from him. Can the expert builder give her adequate answers? Will she show up on the construction site to discover first hand about the details?? Will her discovery of the contracter, and the rift between them cause Lum a set back?