In 1968, Della Adderly—an aspiring art director—strolls down Manhattan’s Fifth Avenue before settling into a seat at a little sidewalk French Bistro. As she is noshing on a cheese sandwich, there is a scream from bystanders and seconds later a body falls at her feet from twenty stories above. It is the woman she had just interviewed with for a job moments earlier. Accident? Suicide? Murder? The mystery—set in the high-stakes advertising world of the sixties—weaves its way through a colorful cast of characters to a shocking, head-turning climax.