Following the startling revelation that Raymond "Red" Reddington isn't who he says he is, Elizabeth Keen is torn between the relationship she's developed with the man assumed to be her father and her desire to get to the bottom of years of secrets and lies. Meanwhile, Red leads Liz and the FBI to some of the most strange and dangerous criminals yet, growing his empire and eliminating rivals in the process. All throughout, Liz and Red engage in an uneasy cat-and-mouse game in which lines will be crossed and the truth will be revealed.