Filmmaker Dakin Henderson, age 24, grew up with two grandmothers who have aged very differently: one is a healthy and active 86-year old, the other died recently after a long and painful decline into dementia. Through an intimate investigation into the stories of his grandparents' aging, Dakin discovers truths about the aging process that are rarely discussed in public, and still largely unknown to people his age. From the perspective of the generation preparing to inherit an increasingly elderly population, What Time Is Left is a personal story of how three generations of one family are coping with the process of their loved elders growing old and dying.