You had both loving parents and sister Kate. Your dad was very good engineer and studied alone black magic. Your sister sometimes stolen his books about evil power which possessed her soul. She together with Michael tested alchemy and magic on prisoners after on castles employees too. She beat you and locked in the prison cell but you STILL ALIVE. Now in the castle everyone's dead except your sister and you. You know what is her main goal. Your cell is opened after five years.
If you are stuck you can open Tutorial txt but remember. This spoiler you very good story