After the death of Officer Tom Coolidge, Detectives Hudson and Davis struggle to find their place in the investigation, while an unanticipated visitor causes a rift in their lives.
When Davis receives unexpected news, she's confronted with her past and must decide how to approach. Meanwhile, a homicide interrupts the reunion and Hudson and Davis are at odds with handling the visitor.
Davis and Hudson get a break on Arellano's tattoo, and meet with a blades expert to narrow down the weapon used to kill Arellano. When Hamilton is able to recover some of the footage off of the thumb drive found in Arellano's throat, they unexpectedly get a break in another case.
When Davis gets a lead, she and Hudson realize that Arellano was involved with a crime organization that was believed to have been dissolved. A further look ties Davis' past to the case, and they follow up with Arellano's employees. A visit to Tom Coolidge's wife, reveals more than anyone could have anticipated.
While Hudson delves deeper into the Moretti organization, she finds something that profoundly impacts her world as well as Davis'. With Arellano's killer in custody, Davis reconnects with her past, as Hudson makes startling revelations about hers. When Hudson realizes the truth could potentially devastate her life-long friendship with Davis, she makes a choice that can change everything.
