Since 'jojo's bizarre adventure ghost story' isn't an official main - line part of the series, it's hard to say precisely. However, if we assume it follows the pattern, it might have a protagonist with a special ability (Stand) who has to deal with some sort of ghostly mystery. Maybe there are haunted places or cursed objects that the characters need to face, all while having the over - the - top and stylish battles that JoJo is known for.
As it's not an established official part, it's difficult to say. But if it were in line with the main series, there might be a Joestar descendant as a main character, who is brave and has a strong sense of justice.
Once upon a time in the world of Jojo, Jonathan Joestar was on a quest. He had to face the evil Dio. One night, as he was resting in an old, spooky mansion during his journey, he heard strange noises. But he wasn't afraid. He knew his Hamon powers would protect him. He got up, and with his brave heart, he explored the mansion. In the end, he found out it was just a stray cat that had made all the noise.
Well, the 'jojo's bizarre adventure novel' has a really complex plot. It spans generations of the Joestar family. There are different arcs, like the one where Dio Brando is a major villain. He has his own evil plans which often put the Joestars in great danger. And the characters keep evolving and facing new challenges in different locations around the world.