The episode centers on a grim task for Officer John Nolan and the team: they must escort convicted serial killer (played by Annie Wersching) to the gravesites of her previously unrecovered victims. Rosalind has made a deal with the District Attorney to reveal these locations in exchange for having her sentence commuted from death to life in prison.
Throughout the trek, Rosalind utilizes her intelligence to play psychological games, specifically targeting Nolan and Detective Nick Armstrong , who was the original officer to catch her. [S2E10] The Dark Side
While the team searches for the graves, they realize Rosalind is not working alone. It is revealed that she has an outside accomplice, Caleb Wright , who has been actively killing while following her instructions. The episode centers on a grim task for
