Good Behavior tells the story of Letty Raines (Michelle Dockery), a thief and con artist whose life is always one wrong turn or one bad decision from implosion. Fresh out of prison, Letty tries to stay afloat, reunite with her 10-year-old son, and show up for the mandatory check-ins with her parole officer. Chaos returns she finds herself on a collision course with a killer, entangling both of them in a dangerously captivating relationship.