Realm of the Runekeeper

From the publisher:

Existing on the fringes of the material plane is a being of immense power, a deity powered by puzzles, riddles, and secrets. Known only as the Rune Keeper, it spends its time ever expanding its realm to protect its sanctum within. Occasionally, when the barrier between the prime material plane and its own is weak, its realm swallows up a village unintentionally. This is precisely what happened less than a fortnight ago to the poor village of Ramshead. Swallowed whole, all that remains is a rift in time and space where the village once stood. Unless someone can find and rescue the villagers trapped inside, they'll perish in the realm of the Rune Keeper.

NOTE: This is not a very combat heavy adventure.