The poignant story of a love triangle that upended the life of one of the most important figures of 20th-century classical music. Composer Arnold Schoenberg befriended painter Richard Gerstl, a young man who shared the revered musician's passion for art—but that was not the only love they shared, as Schoenberg's wife also found herself drawn to the mysterious figure who was Gerstl. The drama and tragedy that ensued also cleared the way for one of the most groundbreaking aesthetic shifts in music history.