Marine lieutenants Dan and Jim fight bandits in the South American jungle, while competing for the attention of beautiful Joan Grant.

A small garrison of Marines are in a Central American country to train soldiers and help with lawful government. A band of outlaws are roaming the countryside robbing, killing and fermenting revolution. Darrick is in change of the training and he is smitten with American Joan Grant. But two things cause trouble for Darrick. One is the new pilot named Malone who is sent to the camp and the other is his old girl friend name Theresa. When Grants' Plantation is attacked by the outlaws looking for money, she flees to the garrison and the Marines search for the outlaws and their mysterious leader. Meanwhile, Darrick and Malone vie for Joan.—Tony Fontana <[email protected]>

Outlying plantations near where U.S. Marines are training the native troops are being plagued by El Vingador and his motley band of cutthroats. Lieutennat Dan Darrick is in charge and he has also fallen in love with Joan Grant, an American who owns a plantation. Another Marine officer, Jim Malone, is shipped in and he sets his sails and sights on Joan , who has left her plantation for the safety of the Marine camp. Escorted by and Malone and some troops, Joan rides out to get some money from her plantation safe but she unwittingly leads them into an ambush by the bandit gang.—Les Adams <[email protected]>