Their unanticipated arrival plunges the house into chaos, with the domineering and snobbish mother, absent-minded father, high-spirited adult children and the put-upon servants all at odds.
While most of them resent having to play host to the unlikable George and Margaret in order to please their mother's vanity, the couple's arrival and the confusion it causes serve as a catalyst for the resolution of various problems in their lives.
Heading for a happy ending, George and Margaret finally arrive for dinner, only for the house to be plunged into darkness due to a short circuit.
The film was made at Teddington Studios by the British subsidiary of Warner Brothers, with sets designed by art director Norman G. Arnold.
As film stands on its nonsense value, perhaps a broader effect might have been obtained by treating some of the roles for the farcical elements they basically contain, setting this against the necessary serious playing of Miss Lohr.