The film follows a day in the life of Detective Chief Inspector George Gideon of the Metropolitan Police. His day starts when he receives information that one of his officers has been taking bribes. Despite his hectic schedule, his wife reminds him his daughter has a violin recital that evening; she also tells him her aunt and uncle are coming for tea before the concert. This becomes a recurring theme throughout the film, as Gideon is continually hampered in his efforts to finish work and return home.