Fifty years after the confrontation between Jonathan Joestar and Dio, Jonathan's grandson Joseph travels to the United States where he receives news that the family's old friend Speedwagon has found the remains of an ancient civilization that invented the famed stone mask that gave Dio his powers. Joseph must learn the art of Hamon like his grandfather to defeat these ancient beings. A re-edited, re-telling of JoJo's Bizarre Adventure episode 10-19.