I Became the Lady of a Perished Noble Family in a Horror Novel

I was reincarnated as the cursed lady of a perished noble family in an unfinished novel.
Thinking I could return once the story ended, I lived recklessly. But everything remained the same.
However, despair only lasted a moment!
“First, I need to make money.”
Utilizing my ability to see ghosts, I opened a (ghost) detective agency.
Thanks to my efficient work, word of my abilities gradually spread. Then one day, a suspicious client came to see me.
“If you don’t want to die, you have to help me.”
The tyrant who mu*dered his father and brothers to seize the throne, and the hidden villain of the story—Emperor Adolf Cher Kravoner.
I absolutely refuse to get involved with a madman!
I tried to turn him down, but…
[…Chapter 12: The Suspicious Client
Isabel couldn’t hide her shock. Why is this person here? Adolf, whom she absolutely should never meet, was standing boldly before her.]
The unfinished novel began to be rewritten as soon as I got involved with him.