An undercover FBI agent learns his job requires more than criminal investigations.

Briggs and Mike tilt rival gangs against each other. Mike learns that undercover life has moral complications.

Jangles takes a Graceland member hostage. The housemates unite to save one of their own.

When a cartel puts a hit on Mike, he returns to Graceland, finding the place changed.

As the agents of Graceland strive to close out their ongoing cases and mend broken relationships, Briggs finds himself coerced into a high-risk undercover operation within the Armenian Mafia.

The agents struggle in the aftermath of the gang war while Briggs tracks down a loose end in order to bring Ari Adamian to justice.