Plot: Jesse James is drawn into a scheme to help Butch Curry rob a stagecoach. However Butch's brother Lonny takes a disliking to Jesse and betrays him to the local marshal. Jesse escapes the ambush with his partner Hank Tracy badly wounded. Aided by a Mexican girl, Juanita Lopez, whom he falls for, he goes to seek medical help for Hank from Maria Frankenstein, the grand-daughter of the infamous Count. Maria eagerly offers helps, wanting the strapping Hank as subject in her experiments in implanting her grandfather's artificial brain. She sets up a trap to get rid of Jesse, while turning Hank into a mindless dolt controlled by her will.