Basically it's a story where Shadow is thinking about Amy and how he has to save the world, etc. for her before fighting Black Doom. Didn't get far in the story myself because what I wanted to do didn't actually happen in the game.
I wouldn't be able to do anything that happened in shadow the hedgehog game becauseb i havent played it so I wouldn't be able to do it if it had any thing to do with the game