The Scarred Land

From the introduction:

A long time ago--perhaps 100 years ago, perhaps 200--a heinous crime was committed. The passage of time has since erased it from human memory, but the lingering psychic trauma has indelibly scarred the landscape. The place remains wild, radiating a sense of deep unease and hurt. You always had a strange affinity for this place--maybe you hiked its trails as a child, maybe you travel there to sit and collect your thoughts--but in the past several months, the landscape has begun to haunt your nightmares. For some of you, these nightmares are filled with a paralyzing terror, for others, an overwhelming malice.