Segestions?

me and a this other kid are making a masive iso game and I need some segestions the story is

                You are a noble in the vitorian age of the U.K. and one of your 

freinds comes running down the street and knocks at your door you let him in
and he tells you that he atemmpted to kill the king for resons he keeps to himself so you let him spend the night at your house and in the moring your
door busts open and the man down in the guest room down stairs you walk down and see the man laying on the floor with great sword in his chest and a notice on the floor…

the game will be an rpg and posibly tile posibly art based and so I need some segestions if you would like to help out your help would be gladly appricated:ne: