Guitarist Quinn Porter chases gigs on the road, largely absent to his twice-ex-wife Belle and their odd, Guinness recordsobsessed son. When the boy dies suddenly, Quinn seeks forgiveness by completing the requirements for his son's unfinished Boy Scout badge. For seven Saturdays he does yard work for Ona Vitkus, the wily 104-year-old Lithuanian immigrant the boy had visited weekly. Despite himself, Quinn picks up where the boy left off: talking Ona into gunning for the world record for Oldest Licensed Driver.