When Mr. Pullen comes to the office on a Saturday to finish the books for audit he is astonished to find his employer, Sir Justin Holbrook, in the penthouse flat with a call-girl. Lady Holbrook arrives unexpectedly, and Holbrook passes the girl off as "the second Mrs. Pullen". A rich Arab sheik is expected, and the entire fate of England depends on Holbrook signing a certain agreement with him: Holbrook, however, suddenly collapses and Pullen has to impersonate him. The arrival of the real Mrs. Pullen and others leads to an impenetrable maze of confused identities, resulting eventually in Mrs. Pullen going off with the sheik, and Pullen installed - presumably permanently - as Sir Justin, with all that entails, including his highly attractive lady.
