The Hardys have joined their father on a trip to Arizona's magnificent Organ Pipe Cactus National Monument. But their journey into the desert takes a sharp and sudden detour into danger. Someone is ripping up and ripping off the rare cacti and turning them into cold hard cash on the black market.
Like the cattle rustlers of old, the cactus thieves strike in the dead of night. Then vanish into the wilds. Forming their own posse. Frank and Joe set out in hot pursuit. Dodging deadly gunfire and poisonious rattlers along the way. Determined to root out the crime. The boys are headed for a desert showdown as hot as the Arizona sun!