French General Birabeau has been sent to Morocco to root out and destroy the Riffs, a band of Arab rebels, who threaten the safety of the French outpost in the Moroccan desert. Their dashing, daredevil leader is the mysterious "Red Shadow". Margot Bonvalet, a lovely, sassy French girl, is soon to be married at the fort to Birabeau's right-hand man, Captain Fontaine. Birabeau's son Pierre, in reality the Red Shadow, loves Margot, but pretends to be a milksop to preserve his secret identity. Margot tells Pierre that she secretly yearns to be swept into the arms of some bold, dashing sheik, perhaps even the Red Shadow himself. Pierre, as the Red Shadow, kidnaps Margot and declares his love for her.

A maid with a checkered past falls in love with the son in the posh household where she works, and gives him a baby.

A large caravan of settlers attempt to cross the Oregon Trail. Spanish-language version of The Big Trail (1930) with an alternate cast and co-director, filmed simultaneously. Raul Coleman (named Breck Coleman in the U.S. version) leads settlers in covered wagons westward across the great prairie and mountains.

This is the Spanish-language version of The Cat Creeps, shot at the same time and on the same sets.

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