A young Native American girl is raped on the reservation, which sparks new, volatile tensions between local oil rig workers and the Cheyenne people.

When a former suspect in a rape case ends up dead in another county, Walt and Vic aren't convinced the death is an accident.

Henry's attempt at justice backfires, resulting in new problems for him and a new investigation for Walt.

The line between justice and the law gets even blurrier for Henry and Walt as their hunt for a killer intensifies.

Walt wonders if a presumed-dead member of the Irish mob is alive. Mathias questions Cady about Catori. A mobile clinic raises Henry's suspicions.

While Ferg secretly works the Cowboy Bill case, Walt and Vic try to find Shane Muldoon. Cady's office is trashed.

Vic gets a surprise visit from her father. An FBI agent helps Walt pin down the mole working with Malachi. A tough race enables Vic to move forward.

Jacob's troubles escalate at the casino. Walt gets an unexpected visitor. An inevitable confrontation leads to changed lives.