It's hard enough to solve a murder...

The task becomes even more challenging when your own brother arrives at the scene, bringing with him a version of reality that contradicts all your beliefs.

1946: Chicago Homicide Detective Dalton Stahl and his partner, Hollis Trent, are called to another gruesome scene: a male corpse with skin completely blue, a cleanly sliced throat, and the brain missing. Further pressure is added when Dalton's younger brother Carson, reappearing after ten years away, raves delusionally-yet specifically-about the "Blue Bodies" case. And details about the crime scene suddenly point to Leopold Galtieri, a notorious Chicago gangster and Dalton and Carson's long-lost older brother, fostered by different parents.

As Dalton tries fitting all of the pieces, Carson's volatility makes him more suspicious: How does Carson know baffling details about the case? Why does he think Dalton's wife, Darlanne, is a "shock trooper"? Is this a sick murder spree or failed experiments, as he claims?

Stahl, a detective whose reality is anchored in truth and objective facts, is challenged...

...to solve a case that could shatter everything.