When Liz learns of a serial killer known as "The Deer Hunter" who tracks his victims like prey, Red helps the task force search for the killer. Meanwhile, the local DC police suspect the city Harbormaster was murdered as Liz struggles to keep her secret from unraveling.

When Agent Keen is questioned in court as a suspect in the murder of the DC Harbormaster, her unusual relationship with Red and their task force falls under scrutiny. Meanwhile, Red enlists Cooper and Ressler to locate "The Major," a dangerous former associate who is key in keeping Liz out of prison.