Marcella is utterly devastated when her husband, Jason, suddenly decides to leave her, admitting that he no longer has feelings for her. Crushed by this revelation, Marcella goes back to her role in the Met’s Murder Squad. A decade earlier, she had put her promising police career on hold to focus on her family. Now, with her marriage unexpectedly over and feeling distant from her 13-year-old daughter and 10-year-old son, Marcella immerses herself in her work to keep herself from unraveling.