Dutch assigns Angelo to kill an Internal Affairs Agent who threatens to take down their whole operation. Still rattled by the shooting, Maria seeks Dave's help in procuring a gun. Agent Grant runs into Angelo, who suspects she may see him as more than just the father of a victim. Angelo and Nicky finally reconnect.

While on a hit Angelo remembers a pivotal moment in his life, 5 years ago, when he learned his brother had Alzheimer's and Angelo was forced to make a life-changing decision.