Half a century ago, Old Man Spears was a hero of the ballpark. In an age when baseball was segregated, he played in the Negro Leagues, providing hope for a generation of oppressed African Americans. Decades later, Spears is an old man in a barbershop making ends meet. An offhand comment about a former teammate, Kennesaw Riles, shocks one of his customers, private eye Ivan Monk, who has deeply buried memories of a ball-playing cousin by that name. Monk knows little of Riles, who has been on the outs with his family since his questionable testimony put civil rights leader Damon Creel behind bars for murder back in the 60s. But before Monk can get the full story, Spears drops dead. Days later, Kennesaw Riles follows suit. Monk knows that the timing is not a coincidence.

To understand the pair of deaths as well as his own past, Monk digs into his family history. He follows the mystery to Mississippi, where he further unravels the murder of two civil rights activists and connects the dots to a group of Mississippi businessmen who may not have changed their ways as much as they claim. Far from Los Angeles, the tenacious P.I. is forced to confront a brand of hatred that he thought had died with Jim Crow.

An LA thriller with roots in the Deep South, Only the Wicked weaves together baseball, blues, and backwoods politics in iconic P.I. Ivan Monk's most personal and politically resonant case to date.