The story of a Basque priest who has been studying the Apocalypse according to St. John for 25 years. Through his studies, he comes to the inescapable conclusion that the antichrist is going to be born on Christmas day in Madrid. To prevent the imminent birth of Lucifer's child, he must first find where the event will take place.
Believing that evil will lead him to evil, the priest begins to commit a series of robberies, beatings and other bad acts in hopes of finding baby Satan and killing him. The result is a funny look at a priest on an evil journey to ultimately save the world. Joining him in his quixotic quest are a heavy metal fan and a famous TV psychic.