"1938. Paris Opera legend Madeleine Moreau must keep newcomer Yvonne Chevallier, whose talent she fears, off the stage. As the long-standing star of the opera, she is nowhere near ready to give up her spotlight. The perfect solution: enlist Yvonne as her understudy so she can never be upstaged. When Madeleine is invited to headline at Germany's preeminent opera festival, she is sure this will cement her legacy. But war is looming, and when she learns that Adolf Hitler himself will be in attendance, she knows she's made a grave error. As Madeleine makes a hurried escape back to France, Yvonne finds herself unexpectedly thrown into the limelight on the German stage. When a newspaper photograph shows Hitler seemingly enraptured by Yvonne, Yvonne's life is upended. While she is trying frantically to repair her reputation at home, Yvonne's son is captured and held as a prisoner of war. Desperate to free her son, she makes an impossible choice: turn to the enemy. As the Nazis invade Paris, both women must decide what they are willing to do in pursuit of their art. They form an unlikely alliance, using their fame to protect themselves and the people they love from the maelstrom of history."--