After five years of marriage, chemical engineer Lorenzo Xavier Vega (Desi Arnaz) tends to neglect his wife Susan (Lucille Ball) in favor of his work. When she wishes aloud that she had a more attentive spouse, her Guardian Angel - coincidentally the mirror image of her favorite movie star (James Mason) - appears.
The angel advises Susan to take a greater interest in Lorenzo's career, so she agrees to accompany him on a camping trip to test the revolutionary new insecticide he's developed.
Susan's dream of a second honeymoon turns into a nightmare when everything that possibly could go wrong does. She becomes determined to save her marriage before it's too late.