Not all people are afraid of ghosts and here you will find confirmation of this. The main character is engaged in their expulsion. It seems that nothing can ever scare him!
One of the dukes called the guy to his house. There are a huge number of creatures that do not want to leave the building. To still get rid of them you have to find an artifact.
This is what affects their location! Go through all the rooms to get this! But it will not be easy to do this, because evil spirits will climb out of holes in the floor. Move the boxes to block their path and expel them!