A scheming crop duster (Cameron Mitchell) hires Cass to fly one of his planes. Little does he know that our boy is on assignment by the government to see if he is doing something illegal (of course, he is) behind that crop-dusting front.

Stan and Cass manage to convince Spencer to work with them in the acquisition of a "bargain": an old twin-engine propeller. Nevertheless, when the two friends see their new purchase, they suffer another disappointment: the old airplane is in a deplorable state. Lest Spencer's reaction, Stan and Cass decide to take the plane to the mechanic Wig Wiggins, even at the cost of interrupting his vacation, to tidy it up a bit. En route to Spencer Aviation, Cass and Stan help Susan, a pregnant hitchhiker, search for her husband, who works in the oil fields.