P.I. Bertrand McAbee, a former classics professor, has a knack for finding dangerous cases. This time a misanthrope, with a satirical sense of humor, is discovered hanging under an Interstate 55 overpass. Suspects seem to be almost infinite and the Chicago P.D. disengages. As McAbee enters this labyrinthine affair, he begins to see that an extraordinary cast of groups with notoriously short tempers might have taken aim at this victim. With the assistance of his team and the play of events his focus turns to the one group he didn't want to encounter.