Jesse James Meets Frankenstein's Daughter

Sometime in the early 1880s, Dr Frankenstein's evil granddaughter Maria has moved to the American West with her brother Rudolph, in order to use the prairie lightning storms in her experiments on immigrant children snatched from a dying town. Maria is very much in charge, killing the children and replacing their brains with artificial ones, intending to revive them as her slaves. Rudolph, however, is reluctant to help his sister, but is too afraid of her to do otherwise. After a number of failures (owing to Rudolph secretly poisoning the victims as soon as his sister revives them), they are finding it increasingly difficult to hide the trail of bodies. Down the road, Mañuel Lopez and his wife Nina decide to leave town with their daughter Juanita because of the frequent disappearances, the latest of which is that of their son.