When Richard Willey, a Government Junior Minister plans to spend the evening with Jane Worthington, one of the Opposition's typists, things go disastrously wrong, beginning with the discovery of a "body" trapped in the hotel's only unreliable sash window.
Desperately trying to get out of an extremely sticky situation, Richard calls for his PPS, George Pigden, who, through Richard's lies, sinks further and further into trouble with everybody and ends up going through an identity crisis.
Things go from bad to worse with the arrival of Ronnie, Jane's distraught young husband. With the addition of an unscrupulous waiter, Mrs Wiley and Nurse Foster, things really come to a head!