Darkness nested in the woman’s heart
And her husband found that the Dark Face lingered there
So he took her to a pit of fire
And he cast her in.
-Twenty-Ninth Explanation, Sun’s Sword 5:8, The Book of Two Faces
The God has two faces, and wears two masks.
One is a bright mask, shining with light, shining like the sun’s gold; it is the Gold Mask.
The other is a dark mask, blackened with shadows, black like the night. That is the Dark Mask.
-First Explanation, Priest’s Teachings 1:2, The Book of Two Faces
The adventure can take place in a slightly shifted reality, where everybody has a totem (an animal guardian). The totem should be chosen randomly and not by the player, it is ok if "Gorflin the Large," a gigantic and aggressive barbarian, has a mouse for a totem.
These totems will assist the characters in small way. It is up to the characters to determine how to get the assistance; the animals won't solve mysteries for the characters only supply the clues. The character may even have a dream where his or her totem actually speaks to them and reveals some sort of clue.