Rugna invents a unique mythology. The “demon” isn't a ghost; it is an infection. It cannot be prayed away. The film establishes a set of “Cleaner” rules (professional exorcists who are secular exterminators). Breaking a rule results in immediate, graphic consequences.

Toxic masculinity, community disintegration, and the failure of institutions.

The film ends with Pedro discovering that his ex-wife has been hiding her son, who is the final vessel for the demon. In a desperate act, he “passes” the demon to a random stranger (Uriel) to save his own family. The final shot of Uriel walking toward a school bus is one of the most nihilistic endings in modern horror.