Niven's father, Lorn, worked in Azerdia as a researcher of mythical creatures, and Niven had always asked about it since he was a child.
"Hey Dad, do ghosts really exist?"
Lorn only replied in a casual tone.
"I don't know, their existence cannot be proven empirically, but that doesn't mean they're impossible. If ghosts didn't exist, it would be almost the same as not believing in angels or Gods."
Niven didn't quite understand his father's words, but it piqued his curiosity, and then Lorn replied.
"I really believe in God, and in ghosts too, so I at least want to understand the idea of God.".
Since then, Niven has also been eager to study the existence of Ghost, just like his father once talked about. He received the address of the laboratory and inherited several underground lab facilities his father left behind the day before he was declared missing.
Niven has no money at all now and no part-time work lined up, so he decides to look for the laboratory in question.
After arriving at an abandoned building on the edge of the city—having walked all the way from central Azerdia—he decides to go inside, even though he hesitated for a moment.
"So this is it… it looks like a haunted building"
Before going in, the basement required a password key, but luckily Niven had brought the letter with the address his father gave him before he disappeared, so he was able to unlock the basement door easily.
And what he found inside shocked him: there was a blueprint of a 'Ghost existence analogy,' physics formulas, and some kind of mysterious machine?
"He really was serious about his research." Niven was stunned by what his father had said about this research and muttered to himself in disbelief as he looked around.