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As a contestant on Art Linkletter's television show, Lucy is challenged to remain silent for 24 hours, with the promise of a $200 reward if she succeeds. However, Linkletter sends another audience member named Ruth, who is actually a plant from the show, to get her to break her silence.

Lucy finds herself assisting an inventor friend in obtaining funding for his projects. To achieve this, she comes up with a plan involving Mr. Mooney, her boss. Mr. Mooney agrees to provide financial support if Lucy and her friend can help him deal with his troublesome 13-year-old nephew.