The story follows a Private Eye sent on a cruise to keep an eye on a wife that might be cheating on her husband. Well the wife actually hired a different girl to take the trip for her so she could spy on the husband which leaves us with a funny romantic tale. The movie stars Doris Day (who is adorable) in her first big movie as the girl pretending to be the wife and Jack Carson as the Private Detective. They of course fall in love aboard the world cruise --but can't get together because the are pretending to be other people. The movie has some good singing by Doris Day and some funny sequences like when the husband finally heads off to track down the wife in Rio based on bad info from the detective.