In Sing a Jingle, Allan Jones plays popular radio crooner Roy King, who goes to work in a war plant after being declared 4F. He falls in love with Muriel Crane, the boss' daughter, who is at first unaware of the fact that King is the heartthrob of millions (he's gotten the job under an assumed name).
While Carol Murdock is becoming the golf-champion at the country club, husband Anthony is all wrapped up in his business and rants a lot about how much time his wife spends playing gold, thereby neglecting their home and him. Carol teams up with golfer Phillip Reeves and they win a tournament together, and Reeves becomes infatuated with Carol. Anthony rants some more and Carol packs up and starts the divorce proceedings. Anthony fights back by taking up golf himself.
Following the death of her fiancé, Margot Weston is left pregnant and unmarried. Former doctor Jim Howard helps the desperate Margot. When her son is born, Jim helps her find a home for the baby with Phil Marshall and his wife. Margot insists that neither the Marshalls nor the child can ever know that she is his mother.
Irish immigrant meets returning war correspondent on a liner bound for New York. When she resists the amours of another passenger, charges result in her being detained at Ellis Island.