Pretty Simple
There will be Mafia members, a doctor, and a sherrif

The number of Mafia members will be determined by the amound of people playing

Mafia-
      Your goal is to kill the sherrif and doctor and once you acomplish that you win, you guys can comunicate on who you want to kill and once you mail me i will take the majority vote. You guys can kill one of your own for whatever reason if you find one.

Doctor-
      You are here to try to save the person the mafia is killing you will choose someone you think the mafia is after. And you can save your selves

Sherrif-
      You have to figure out the mafia members and once you capture all the mafia members you and the rest of the civilians win

Civilians (the ones that arent anything)-
      You have to hope you have a good sherrif and doctor so that way you will not die

Otherwise there will be an updated story once all major players have mailed me their responses.

Good Luck and hope you dont die