Bryanston Films were responsible for numerous highly underrated British b-movies of the late 50s/early 60s and this one, at barely an hour in length, is up there with the best. The narrative is simple - a young salesman (Robert Stephens) in a wallpaper manufacturer, trapped in a seemingly loveless marriage, meets and is instantly attracted to a newly employed designer (Shirley-Anne Field) at the works. They want to get to know one another better but privacy is hard to find. So he books a room at a nearby private hotel for an hour one lunchtime....and there the fun (though not the way he intended) begins.
There are two ways of looking at what happens next - either she is, in reality, somewhat unhinged and her subsequent actions are the outpourings of a hysterical individual or, and I prefer this interpretation, she cleverly turns his (white) lies around, deciding that she is worth rather more than the occasional lunch hour fling.
Either way, the conclusion, with him, visibly rattled, returning to his desk whilst she, yards away, continues as nothing has happened is rather chilling.
Field is excellent throughout this film and it's not hard to see why she attracts most every male she encounters in her job. Stephens also excels as the naive, rather gauche individual who, whichever way you look at it, completely misreads the situation.
Definitely worth looking out for with the bonus of some great location shots and a very poignant soundtrack.