After the Accident, Bruce Banner has been difficult for S.H.I.E.L.D. to track, so Director Fury has put his best Agent on the case to find the rogue physicist and evaluate him from a distance with orders not to engage the subject. When he settles in Detroit, so does Natasha so she can keep her eye on him. Why does the notorious Black Widow find the last part of her assignment becoming more and more difficult as the weeks and months pass? Has she crossed the line and started to care for him? Has she become compromised?