When Union army captain Chris Tanner (Robert Woods) finds himself unjustly imprisoned over a stolen Gatling gun, he makes a daring prison break to clear his name by recovering the weapon and its kidnapped inventor before they fall into Confederate hands. But as he zeroes in on the true crooks, he uncovers a conspiracy that could claim his life. This spaghetti Western from director Paolo Bianchini co-stars John Ireland and Ida Galli.