Geometria (film)

Geometria is a 1987 short fantasy horror comedy film written and directed by Guillermo del Toro. It is based loosely on Fredric Browns short story, Naturally, which was originally published in Beyond Fantasy Fiction and later reprinted in the short story collection Honeymoon in Hell. Geometria was shot in Guadalajara, Jalisco in Mexico. It is the tenth short film del Toro directed, though all but 1985s Doa Lupe remain unreleased.

While the woman sits in the living room, watching a pastiche of The Exorcist, she hears her son screaming from the next room. When she enters, she finds him standing in the middle of the bloody seal. He shouts a warning, telling her that the pentagon is his only protection. A glowing portal opens in the wall, and a demon Rodrigo Mora steps through. The boy asks the demon to grant two wishes. The first is that he will not fail geometry again. The second is the return of his father, Francisco, who died in an accident three months ago. The demon complies with the latter, causing Francisco to materialise immediately. However, he is now a mindless zombie. Francisco kills and eats his wife, while their son looks on in horror, unable to step out of the pentagon for fear of losing its magical protection.The demon commands the boy to surrender, but he refuses to give in, saying that he cannot be harmed while he stands within the pentagon. The demon reasons that he has already granted one of the boys two wishes his family is together again. He also points out that what the boy has drawn is not a pentagon, but a hexagon, which offers no magical protection whatsoever. The demon muses that the boys other wish has also been granted he will never fail geometry again. Francisco approaches his son from behind and takes hold of his head, tilting it backwards. The boy laments the unfairness of his situation. The demon agrees, and reaches out a hand to take hold of his throat. The screen fades to black as ripping sounds are heard. ........

Source: Wikipedia