A hid­den truth, a relent­less pur­suit, and a sto­ry that his­to­ry could not silence. Ger­many, 1938. On the eve of war, as Nazi vio­lence engulfs Jew­ish homes and busi­ness­es, young Sarah Frank escapes an SS offi­cer whose obses­sion with her fam­i­ly turns dead­ly. Forced into a world sud­den­ly stripped of safe­ty and cer­tain­ty, she finds refuge in a trav­el­ing cir­cus — an unlike­ly sanc­tu­ary of lion train­ers, acro­bats, ele­phants, and out­siders who become her fam­i­ly. Under their pro­tec­tion, Sarah dis­cov­ers a courage she nev­er knew she pos­sessed, even as the Nazi grip tight­ens and the man, she fled clos­es in. New York City, 1957. A rou­tine autop­sy at the city zoo uncov­ers a chill­ing object inside an elder­ly lion: a sil­ver SS ring engraved with a skull. For chief vet­eri­nar­i­an Mark Spencer, the dis­cov­ery ignites a transat­lantic search that leads through post­war Paris, Tel Aviv, and the shad­owed cor­ners of New York — toward the buried sto­ry of a girl who dared to chal­lenge an unfath­omable evil.