 An apparently legitimate businessman named Masterson provides a "transportation maintenance service" to trucking companies. Jim Hawley s trucking company refuses to sign and experiences numerous costly breakdowns despite careful work by his mechanics. Dan Mathews finds that many of the breakdowns occur after the drivers have visited the Walnut Cafe and that two café employees (Artie and Jenkins) have ties to Masterson. Dan convinces Hawley to subscribe to Masterson s service while making certain that costly breakdowns continue. Masterson pays the claims as agreed but eventually suspects that he is being double-crossed and he confronts Artie and Jenkins at the café. The confrontation has an ironic result.