Miami, 1951. With a flurry of UN engagements bringing Mrs. Roosevelt to vibrant South Beach, Kay Thompson is thrilled to escape the post-Christmas blues in Washington DC—and distance herself from the sting of her recent breakup with private investigator Tim O’Malley. The dizzying sights and sounds of Miami reach their peak at the Copa City Club, where a late-night meeting with singer Josephine Baker reveals a troubling truth: Baker's bold stand against segregation has made her a target.

Josephine dismisses the threats. But Rosaleen—her cautious young assistant with big dreams—is deeply afraid. That's why it's a stunning shock when a dead man turns up in Josephine's dressing room and Rosaleen is the one arrested for his murder. Determined to exonerate her new friend, Kay realizes it will mean facing conspiracies and prejudices that reach into the darkest corners of American society still haunted by the horrors of World War II.

Now, tangled in a high-stakes murder case with lives and legacies on the line, Kay joins forces with Mrs. Roosevelt and her former flame to confront the sinister forces lurking just beneath Miami's glittering Art Deco surface. But when a killer's scheme comes into sharp focus, Kay must act swiftly in a quest for justice that proves far more dangerous than she ever bargained for . . .