New York City, 1956. When nineteen-year-old Marion Brooks "comes across an opportunity to audition for the famous Radio City Rockettes, ... she jumps at the chance to exchange her predictable future for the dazzling life of a performer. Meanwhile, the city is reeling from a string of bombings orchestrated by a person the press has nicknamed the 'Big Apple Bomber,' who has been terrorizing the citizens of New York for sixteen years. ... With the public in an uproar over the lack of any real leads after a years-long manhunt, the police turn in desperation to Peter Griggs, a young doctor at a local mental hospital who espouses a radical new technique: psychological profiling. As both Marion and Peter find themselves unexpectedly pulled in to the police search for the bomber, Marion realizes that as much as she's been training herself to blend in, ... if she hopes to catch the bomber, she'll need to stand out and take a terrifying risk"