When an illegal bookie threatens a customer who owes him money, the customer collapses and dies of a heart attack. Arthur, who is about to go into hospital for an operation, is an eye witness to the event and in no time he is being chased by the police, the bookie and the customer's family.

When a gangster passes away, he leaves his daughter with clues to the location of his ill-gotten gains. She offers Terry tickets to the Orient Express, and Terry and Arthur spot underworld business on the luxury train to Venice.