Astronauts blast off to explore the moon on Rocketship X-M or "Rocketship eXploration Moon". A spacecraft malfunction and some fuel miscalculations cause them to end up landing on Mars. On Mars, evidence of a once powerful civilization is found. The scientists determine that an atomic war destroyed most of the Martians. Those that survived reverted to a caveman like existence.

Bill Burnett, a resident of Bali, visits New York City, meets and falls in love with Gail Allen, the successful manager of a Fifth Avenue shop, who is determined to remain free and independent. Bill proposes, Gail declines and Bill goes home to Bali. But a young girl, Rosie, and Tony the Window Cleaner, who dispels advice on every floor, soon have Gail thinking maybe she was a bit hasty with her no to Bill's proposal. Ere long she discovers that she does love Bill and can't live without him. She goes down to Bali to give him the good news. He learns that he is soon to marry Noel Van Ness. She goes back to New York City.