Stew is worried that Dean Sr.'s anger problems will hurt his case, but Dean Sr. insists there's no problem at all. Dean says there's only one surefire way to find out what the people really think: they take it to the masses for some good old-fashioned focus group testing. Before long, the entire family gets caught up in the feedback of how they are perceived by others.

After finding out Dean Sr. is guilty, Stew thinks they should settle the case. Dean, of course, believes they should try to win, and wants to use one of his old "Grinder" tricks, by throwing himself into an unrelated sub plot that will lead him to what he needs to solve the case. Meanwhile, Stew is concerned that he is now "infected" by "The Grinder".