Arthur plans to make a killing by buying some cheap tobacco from a sailor coming over from France and sends Terry and young Arnie down to the coast to meet the prospective sellers. When Arthur joins them he learns that two respectable sailing club members are the actual importers and the party sets out in a yacht to make the deal. On their return they are intercepted by a customs launch and the spoils thrown overboard though Arthur is quick to retrieve then when they are washed up on a beach.
Shamy is a young Indian who has owed Arthur money for a while and eventually gets round to paying him. Unfortunately the £20 notes he gives Arthur are forgeries, a fact which comes to Arthur's attention when he is accused of trying to spend them in the Winchester Club. In the meantime Shamy is heading for the airport and a flight back to India.
Arthur and Terry are initially surprised that the apparently confident and successful businessman Clive Cosgrove should be so apprehensive about getting married. Until, that is, the truth dawns on them. All of Clive's business concerns are run by manageresses and he is already married to all of them.
Arthur's friend Ruby Hubbard, an authoress, returns to London to write a new book and to sell her house, only to find that Barney, her ex-husband, has sold the house behind her back. She seeks Arthur's help in recouping the money whilst Terry and Ruby's secretary come up with ideas for the latest book.
After he has got himself stuck in an industrial meat freezer cabinet whilst working for Arthur, Terry decides to leave his services and help his friend Charlie in the second hand business. Unfortunately for Terry, whatever he does Arthur is never far away.
Ever on the look-out to make money, Arthur buys two thousand tickets for an England-Scotland match at Wembley from ex-Liverpool footballer 'Benno' Benson, and drives North to Scotland with the long-suffering Terry and eager apprentice Justin to sell them to Scots fans. The tickets are, however, forgeries as Benno is a con-man and a van-load of angry men are in pursuit of Arthur and his travelling companions.
Arthur and Terry help Dr. Sudbury, a hypnotherapist, and his teenaged fiancee Rita, who is an heiress about to inherit £25,000, escape her disapproving family who say the doctor has hypnotized Rita into falling for him so he can claim her money. Terry, meanwhile, becomes a hit with the ladies when he becomes a steam-cleaning operative.
Arthur stands as an independent candidate at the local bye-election but the seat holds the balance of power for the whole borough and his rivals use dirty tricks, landing him in custody. Can Terry's journalist girlfriend Julie spring him in time for him to address his crucial campaign meeting?
Arthur's get-rich-quick schemes are, as usual, going nowhere fast. He invests in a racing greyhound which he calls Daley's Deal but it is a non-starter. Furthermore his efforts to make a profit from some dodgy video recorders obtained from Tasty Tim attract the attention of several members of the police, with the resultant pursuit ending with a bang.