Tristan und Isolde is an opera composed by Richard Wagner, based on a medieval romance. The story follows the tragic love affair between Tristan, a knight, and Isolde, an Irish princess. After drinking a love potion, they become passionately entwined, leading to conflict and heartache. Set in a mythical world, the opera explores themes of love, fate, and sacrifice. The characters face insurmountable obstacles, including loyalty to King Mark, Isolde's betrothed. Their love ultimately leads to tragedy, highlighting the tension between desire and duty, making it a profound exploration of human emotions.