Amidst the Mists and Coldest Frost

Scenario Description: "You undertake an expedition in the lands of the Frost Barbarians to secure a trade agreement with the Fruztii. While you dream of coming home richer, the only thing the barren landscape promises is a quick death for the unprepared or the stupid. And that was before the locals began falling prey to the supernatural killer that raids form [sic] the mist. Can you save the locals, secure the lucrative trade agreement, and make it home alive? An adventure for characters level 1-8"