God's Invitation

I was visiting the cemetery, and suddenly one day there was a mysterious invitation from the security room, asking me to go to a castle deep in the mountains and old forests. If I could make it out alive, I would be given a huge bonus that I couldn't spend all my money. However, I was not the only one who went, and one after another died mysteriously. The nightmare will stay with us forever and we will never be able to get rid of it.