A first-class demon goes out to party one night. For some unknown reason, she wakes up on Earth as Dave’s guardian-demon — a human who cannot see her —, with an unknown body, a name she does not recognize, unable to go out on her own and forced to cohabit with a cat and an angel — who cannot stand her —.
Odile — the demon —, ripped out of her power and counting on the Internet as her only — and uncertain — way of communication, will try desperately to return home.

But what looks like a simple accident will be revealed to be part of a complex scheme to maintain her far from politics and call elections in order to choose Hell's New Ruler.

Enclosed in a human shape, Odile will see astonished all that is around her: sexism, homophobia, racism, menstrual taboos, social networks, revolutions and great wars… People seem weak yet intriguing to her, and they will also manage to captivate her with their dreaming spirit, their creations and, above all, art. Besides, the intervention of an unexpected nemesis will make Odile and Ella — Dave’s guardian angel — leave their ‘natural antagonism’ aside and reconsider their way of viewing the world, and accept, much to their regret, the complicity and attraction that is building up between them.

When a company executive dies under mysterious circumstances by "natural causes", three people begin separate investigations that expose secrets that may ultimately unravel an idyllic Martian colony.