Ursula Becker's operatic star is on the rise in Nazi Berlin...until she discovers that she is one-quarter Jewish, a mischling of the second degree. Although Hitler is aware of her lineage, her popularity and exquisite voice protect her and her family from persecution. As Ursula's violin-prodigy half-sister comes of age, she comes to the attention of the F hrer, who welcomes the awestruck teenager into his elite, private circle. When William Patrick Hitler arrives in Germany and is offered employment by his doting Uncle Adolf, a chance encounter with Ursula leads to a romantic relationship that further shields the young diva from mistreatment. But for how long? Restrictions on Hitler's perceived enemies tighten, and Ursula is ordered to sing at Hitler's Berghof estate. There she throws down a gauntlet that unleashes the wrath of the vindictive megalomaniacal leader. Fearing for her life, Ursula and Willy decide to emigrate to England. But as the ship is about to sail, Ursula disappears. Desperately hoping that Ursula is still alive, Willy crosses the globe in an effort to find her, even as his obsessive uncle taunts him, relishing in the horror of the murderous cat-and-mouse game.