A comedy about the relationship between a modern, shy, young man and the spirit of a violent knife-killer murdered in 1920. They make a pledge: the latter will tell the former what exists beyond death if he allows him to inhabit his body for a whole day. Thus, the ghost will go around an unrecognizable twenty first century Buenos Aires to uncover the causes of his own death.

The story of Daemonium begins in an alternate universe to ours, in which magic and technology coexist with humans and demons. A powerful family hires a band of mercenaries and forces Fulcanelli, a wizard and con artist, to invoke a demon with the purpose of gaining even more power. Of course, things go terribly wrong. The wizard escapes and the demon slaughters the mercenaries, with the exception of Razor. He’s the one who seals the deal to become lord of the criminal underworld. The family kidnaps Lisa, his pregnant wife, and turns her into a merciless killing machine and the spear point of their offensive against Razor. But she’s not the only threat to the crime lord. It’s only a question of time before the demon returns to claim Razor’s soul. Fulcanelli seems to be the key to stopping the demon and Razor sends out his band of sexy killer robots to find him.