In 1929 the King and Queen of Spain inaugurated one of the most relevant buildings of the 20th century, the German Pavilion of the Universal Exposition in Barcelona, by the architect Mies Van der Rohe. Many years after, the narrator of this story, obsessed by the German Pavilion, goes through the photos and finds that there is some kind of mystery hidden in the old images, an enigma to be solved, perhaps the posibility of a crime.