The film Immortal Beloved was about the unique and professional composer Ludwig van Beethoven. His inspiring life as a composer is well known, but his collection of lovers is not. This is where the movie takes off as Ludwig van Beethoven dies, and his important estate papers are accessed by his associate Anton Schindler, only to find three letters addressed to an anonymous lover, who he calls Immortal Beloved. The secret of who this woman is has intrigued Anton so much that he must find this Immortal Beloved.
The movie reviews Beethoven's life, and his compulsive love life of one lover after another. Several ladies are interviewed to find out which one is his Immortal Beloved. This proves to be a very hard task for Anton to discover. Whoever the woman was, he loved her more than he had ever loved any woman. Anton's search deepens as he finds out that the Immortal Beloved is actually Beethoven's sister in law Johanna, which his very own brother married. What was not known was that Beethoven and Johanna were lovers, and that she became pregnant by Beethoven. He was not able to marry her at the time, so she married his brother Kaspar. Kaspar believed that the baby boy was his and not his brother Beethoven's.
His love for this woman has tortured him his whole life, and plus the loss of his hearing sets him into even more turmoil. Beethoven decides to raise his nephew who is actually his son named Karl van Beethoven so that he can make him an aspiring musician like himself. But poor Beethoven is unable to make Karl into the musician that he wants him to be. The secret life of Beethoven is finally exposed to all. Finally Anton has solved the mystery of who the Immortal Beloved is. This film is historically true and is a fascinating dictation of Beethoven's life.