The attractive professor of literature Victor Vega decides to accept the highly unusual proposal put to him by the widower of the writer Hugo Mendoza: to investigate whether her husband is still alive, despite the fact that his death has been legally certified, and to discover who is sending a new manuscript by the dead author every 3rd of December. Victor uncovers mysteries that will endanger his life, but he is accompanied by a beautiful, enigmatic woman with whom he falls hopelessly in love. Paloma, a histrionic mathematician, and Santa Tecia, member of an enclosed order of nuns, and a genius with computers, also protect Victor in this daring novel brimful of enigmas.