If you are at all familiar with astrology, you'll find the tongue-in-cheek astrological subplot very amusing. Essentially a straightforward romantic comedy of the era, with a wartime subplot in addition to the astrological one. Astronomer Powell, pre-occupied with recent developments in his work, doesn't devote sufficient time to his marriage, so wife Hedy seeks guidance from the neighborhood astrologer. Informed that she is about to meet a new love, she becomes infatuated with a handsome air raid warden, presuming him to be her foretold lover. Predictable hijinks ensue, with the predictable happy ending.
A comment on the role of the astrologer, portrayed by Fay Bainter. Her character is more a shrewd neighborhood gossip than a psychic, but appears to be a genuine believer in astrology as opposed to a calculating charlatan. Her character is presented as essentially a harmless eccentric. However, she is later revealed to be a rations hoarder (much frowned upon during WWII). Some PC Pagan/New Age persons may therefore be offended by the negative, 'discriminatory stereotype' depicted in the film. Others can look forward to some silly, harmless entertainment.
I recall this amiable hodge podge of a film with affection. The stars are charming and appealing. It also has considerable camp value. And yes, Hedy's ethereal gorgeousness is nothing short of stunning.