Diablero, based on the book El Diablo me obligó by F. G. Haghenbeck, is a horror fantasy thriller centered around Father Ramiro Ventura, a fallen priest who finds himself seeking the aid of legendary „diablero” or demon hunter Elvis Infante. With the aid of Nancy Gama, a modern day superhero, this improbable trio sets in motion a series of events that could determine the fate of mankind.