MMIB is a GMless mystery game, like Lovecraftesque. When the game starts you'll arrive on a new planet, or a new historical period, and begin populating it with intriguing details. Each turn one of you will play the Nemesis, bringing in Lore that will later be woven together into a villainous plot! Between scenes you each privately leap to conclusions about what the Lore so far might mean, and who the villain is - then use that to guide your contributions when you take your turn as Nemesis.