Based on real-life events, after the death of his mother, Frank carries a great deal of grief, causing him to develop a heightened sensitivity to beings from the paranormal world, both those seeking to communicate and those who wish to harm him. Now, he must uncover the messages these beings seek through.
The sensation you'll feel is of being constantly accompanied by beings from beyond the grave who whisper, wail, and, if they choose, appear to give us clues on how to solve a puzzle and continue the story.
Frank will be aided by a bell his mother left him that detects when an evil presence is nearby. He must also search for weapons to stop the demons.
Frank's mother tried to warn him about this several times, but he thought it was all in his imagination.