The story is fascinating and is told through easily digested chunks scattered through the game. It's a little cliched, but Frictional does some smart things with the old hero-with-amnesia gimmick. Hints are also provided by flashbacks that regularly pop up out of nowhere. Early stages have a bit of a Memento vibe, with Daniel trying to discover hints about his past through reading notes that he apparently left for himself and searching through old diary entries and random scraps of paper.
You take on the role of Daniel, who awakens in the darkened halls of Brennenburg Castle at the start of the game with a bad case of - you guessed it - amnesia.