The murder of her father sends a teenage tomboy on a mission of 'justice', which involves avenging her father's death. She recruits a tough old marshal, 'Rooster' Cogburn because he has 'true grit', and a reputation of getting the job done.
A cross-country road race is based on an actual event, the Cannonball Baker Sea to Shining Sea Memorial Trophy Dash, organized by Brock Yates to protest the 55 mph speed limit then in effect in the U.S. The Cannonball was named for Erwin G. "Cannonball" Baker, who in the roaring 20's rode his motorcycle across the country. Many of the characters are based on ruses developed by real Cannonball racers over the several years that the event was run.
Police officer Tom Sharky gets busted back to working vice, where he happens upon a scandalous conspiracy involving a local politician. Sharky's new 'machine' gathers evidence while Sharky falls in love with a woman he has never met.
When awkward teen Ronald Wilby accidentally kills a young girl whose sister rejected his affections, his overbearing mother decides to hide him from the law by creating a concealed room in their home for him to live.