What should on do in the northwestern application when they ask about your career plans—if you don’t have career plans yet?
Where do you see yourself in a few years - what are some options you are considering? Law schools want students who have some sense of what they want to do with their law degree; this is because many people use law school as a sort of three-year postponement of serious career-related decision-making.
If you’re not sure, find out what Northwestern’s strength is (IP, Employment, Litigation, etc. I’m not sure because I’m not looking at them) and tentatively decide you want to do that. 