From the introduction:
Are you afraid in the dark? When every muted sound could be the approach of death, when every shadow could conceal your doom. What about the darkness you bear within? Who are you? You don’t recall. What terrible secrets lurk within your past?
You want to fight but do you know how? You need the aid of others to shed light into this darkness. Can you trust them? What awful recollections escape them, hidden from the mind's eye?
You want to find more about your past. But first, you need to survive.