At 100-years-old, Dr. Howard Tucker has been recognized by the Guinness World Records’ “Oldest Practicing Doctor.” Following a more than seven-decade career, capped off by a stint teaching neurology to medical residents at Cleveland's St. Vincent Charity Medical Center, Dr. Tucker begins to slow down and grapple with aging for the first time. Told through the eyes of his grandson, the film follows their journey through a changing medical landscape as their relationship deepens and dynamics shift.