In a village the characters hear rumors of a man that recently came through screaming of demon attacks and murderous insects.
A long forgotten and abandoned mine has been recently rediscovered by a local village.
A large explosion was heard 4 days ago coming from the foot of the nearby mountains. Ever since then no trade wagons have come through as they usually did.
There is a land where every person wears spectacles. Those without eyeglasses are considered to be the lowest stratum of society, so adventurers without glasses are treated like outcastes. It certainly would explain those heroes wearing sunglasses for no apparent reason...