Are you the Cultist?

The roaring '20s. Players take on the role of investigators who have traveled into the nearby mountains to a remote mansion that holds a terrible secret. Unfortunately, a vicious storm has blown in, trapping the investigators, and knocking out both electricity and telephone. Inside, a group of cultists has been quietly waiting to strike... and that time is now! Each night, cultists murder one of the investigators, while each day investigators put someone to death with the hope of rooting out the cultists.