 Bus driver Stan Butler agrees to marry Suzy, much to the anguish of Mum, her son-in-law, Arthur, and daughter Olive. How, they wonder, will they ever manage without Stan s money coming in? Then Arthur is sacked, and Stan agrees to delay the wedding. Meanwhile, he hits on an idea: Arthur should learn to drive a bus. Somehow he does just that, and even gets a job. Stan then blackmails the Depot Manager into giving him the job of driver on the new money-making Special Tours Bus. A great idea ...if only the inspector hadn t taken Stan on his trial run to the Windsor Safari Park.