Trace of the past

Trace of the Past — a first-person horror game, will show you a mystical story of Charles Worren's life, a child of boarding school for orphans named " Grief Hill"
After some mysterious events in his Childhood, Charles ends up in psychiatric clinic and loses a half of his memories.
In 19 years, he finds in his mailbox an envelope with an old photo inside, that shows Charles. The address is that boarding school for orphans " Grief Hill"
But who and what for sent him this photo? The boarding school has been closed for years. Charles decides to find it out and is off to his mysterious past.