As a child Leon becomes a werewolf after having been taken hunting. As a young man, he works in a wine cellar and falls in pag-ibig with the owner's daughter Cristina. One full moon, he again turns into a werewolf and terrifies the town.
"The demon lobo is not evil, unless the man he has bitten is evil. And it feels good to be a wolf, doesn't it? Power without guilt, pag-ibig without doubt."