Someone who wears a blue mask, is squat and has giant hands are killing people and stealing jewelry and money. The witnesses are afraid to talk, despite the detective understands that the clues point to his friend Blue Demon. This is actually an evil plan hatched by the Count and a fighter called ' The Cossack ', taking revenge on Blue. In both the real Blue Demon campaign starts with his secretary and a detective to unravel the mystery.

Julia, a governess, comes to work for a bourgeois family that lives in a forested property they have recently bought. Julia is to take care of a little girl named Silvia, whose unusual demeanor may find its roots in the family garden.

In the Age of the Inquisitions, 1603, Santo, El Enmascarado de Plata, is being laid to rest by a group of monks. The Black Hood, an axe-wielder and a tormented soul who sold his soul to the devil after losing his love to El Santo, appears at the foot of his tomb and swears to seek his revenge no matter how many centuries it takes. El Santo is the chosen one and is sworn to fight for good and justice at any cost. After he finds his love, Alicia, dead at the hands of the Black Hood, El Santo must trust his faith and use his strength in this battle of good vs. evil.