Music history professor Daniel Paniagua's greatest dream is to find the manuscript of Ludwig van Beethoven's Tenth Symphony. However, there is no certainty that this work was written at all. Suddenly, a young man finds himself drawn into the investigation of the brutal murder of a famous English musicologist. Just before his death, he performed at a private concert in Madrid the first movement of the Tenth Symphony, which he allegedly recreated from Beethoven’s drafts and sketches. But Daniel is sure that this is a genuine work of a brilliant composer...