Because of his difficult character, Colonel Lennox, commanding at Fort Sharp, a remote outpost on the border of the United States is hated by the soldiers of his troop. The situation is even more complicated when the fort is attacked by Indians.

Robin Hood star Richard Greene plays an agent who goes to the French-Spanish border to round up some smugglers and counterfeiters after his brother is murdered. He is helped by singer Anouk Aimee, who he falls in love with.