Denny Roberts and his college-age friends are somewhat jealous of Denny's underage brother, Joe, who idolizes them all. The older young men treated young Joe as a nuisance and spend much of their time trying to avoid him in the waning days of summer vacation in their small hometown of Mound City, Florida. With only a few weeks left before returning to college, Denny hits on an idea that he thinks will get the young pest out of their hair once and for all. The older boys produce a fake letter of introduction that fabricates a fictional friendship between the famous billionaire businessman Howard Hughes and the letter's signor. They give the letter to Joe and encourage him to go on what they believe will be an elaborate prank. Innocent Joe is grateful for the opportunity and spends all of his summer job earnings on an airplane ticket to travel from Florida to Nevada for a chance to meet Hughes at his Las Vegas penthouse hideaway. Armed with the phony letter and God's promises that all ...