he narrative, over-seen by Hirohiko Araki, takes place immediately following the events of Stardust Crusaders. Jotaro Kujo and his allies, who had just defeated the evil vampire DIO, are suddenly attacked by friends and enemies who have died along the way. It is then they are approached by a young Robert E.O. Speedwagon, who possesses a piece of the Saint's Corpse that allows him to travel through time and space as well as vanquish the evil influence possessing the others.
Source: Wikipedia, "[en.wikipedia.org/wiki/JoJo%27s_Bizarre_Adventure%3A_Eyes_of_Heaven JoJo's Bizarre Adventure: Eyes of Heaven]", available under the CC-BY-SA License.