"When Frank and Joe Hardy join their Uncle Hugh for lunch, the main course turns out to be a bizarre kidnap plot. After a violent scuffle, Uncle Hugh is whisked away, and the boys suddenly find themselves in deep trouble with a U.S. espionage unit.
Special Agent Starkey is out to prove Hugh is a traitor and accuses the boys of helping him escape. To complicate things, a beautiful mystery woman named Charity is also on their uncle's trail. Meanwhile, Frank and Joe are stranded in a strange city far from home, being hunted down by two desparate gangs--with orders to shoot to kill..."