Her investigation leads her back to Laszlo's organization. Despite her original mission, she forms an uneasy and forbidden alliance with Jimmy, who is searching for a traitor within his own ranks. As they work together, Grace becomes increasingly entangled in the city's dangerous criminal underworld, often crossing moral lines that alienate her from her husband and daughter.

Jimmy discovers Grace’s true identity early on but agrees to help her find Sam's killer if she helps him find the internal mole.

Jimmy’s sons, Alec and Max, are central to the internal power struggle. Alec is the impulsive "black sheep," while Max is more calculated.