The Marines Fly High plot
"Power-dive drama...Loop-the-loop romance"
A small garrison of US Marines is in a Central American country to train local soldiers and help the legitimate government. A gang of outlaws led by John Henderson, aka El Vengador, is involved in robberies, murders and instigating a revolution in the countryside. Lieutenant Danny Darrick is in charge of the training camp. Danny is madly in love with the American Joan Grant, who runs a plantation. However, two things cause problems for Danny: new pilot Lieutenant Jim Malone, who has been sent to his camp and has a crush on Joan, and his former girlfriend Theresa. When Joan's plantation is attacked by the outlaws looking for money, Joan flees to Danny's camp...