1963. John Fitzgerald Kennedy is a lightning rod for public opinion. The handsome, youthful leader, who is prepared to take America into a brighter future, earns love from cheering crowds. But those who oppose his political agenda — including some who consider themselves betrayed by the Kennedy clan — dare to think the unthinkable: kill an American president. Nathan Heller is Chicago’s most celebrated private detective, hobnobbing with Hugh Hefner, getting written up in Life magazine, enjoying the fruits of a long career that began in a one-room office and now is a coast-to-coast agency. When he does a small favor for a friend — who handles PR for the Teamsters — Heller runs into an old West Side mob crony, a small-time hustler named Jack Ruby.