A disturbed young boy who kills his father with a tractor is institutionalized. Years later, when he's finally released, he goes on a murderous rampage after he finds out that his mother has remarried.
On the way to Rome, a thief captures the Duke of Riviera y Fuentes and decides to take advantage of the opportunity to impersonate him. The thief makes his way to Rome in the duke’s place and seduces the mysterious Lucrecia Borgia who always wears a mask. He’s in for an erotic time at Lucrecia’s palace.
