Breaking through to the truth is deadly

After months of nerve-wracking undercover work, Detective Erin O'Reilly is finally getting ready to bring down the Irish Mob. She has everything she needs: recordings, witnesses, and even the secret O'Malley ledger. She just needs to wait a few more weeks while the NYPD makes the final preparations to drop the hammer. If everything stays calm on the street, there's nothing to fear.

But a routine construction job in Brooklyn shatters Erin's hopes for peace. When a work crew unearths a trio of decade-old bodies, a cold homicide case heats up fast. One of the dead men is a missing O'Malley associate linked to a long-ago turf war with crooked Teamsters.

Erin and the Major Crimes squad start digging to find the truth, but unhinged gangster Kyle Finnegan wants answers too. Finnegan may be crazy, but he's also smart. He's more than willing to break anything and anyone to reach his goal. Erin and Rolf will have to smash through enemies and so-called allies alike to unearth a secret worth killing for.