Tolstoy answered this question in the first sentence of Anna Karenina when he wrote, "Happy families are all alike; every unhappy family is unhappy in its own way." When you are dealing with Parkinson's, I think the answer is slightly different: every family affected by Parkinson's battles its way back to happiness the best way they can. Marty and Monica each belong to families that have been rocked by Parkinson's. Each family is at a unique transition. Monica's mother has just been diagnosed, and the family is trying to find out what that means exactly. Marty's mom is facing the decision of sticking with her less and less helpful medicine, or undergoing brain surgery to receive deep brain stimulation. Marty and his mom each imagine what their life will be like if she becomes a cyborg.