Ida and Louise Cook spend the 1930s traveling to German opera houses, until Hitler seizes power and begins to threaten the safety of their Jewish friends. The sisters vow to help, but how can two ordinary working-class women with limited means make a difference? Together with their beloved opera community, the sisters devise a plan to personally escort Jewish refugees from Germany to England. The success of the plan hinges on Ida and Louise’s ability to smuggle contraband jewelry and furs beneath the watchful eyes of the SS soldiers guarding various checkpoints. But how many trips can they make before someone blows a whistle? Or before the final curtain falls on Germany’s borders?