Turret of the Frost Giant

From publisher blurb: The free adventure for December is the Turret of the Frost Giant. It is an adventure designed to interrupt a party of adventurers who are going from point A to point B. on a message delivery assignment. While on the mission the party runs into a blizzard, pack of wolves, and a rogue band of humanoids attempting a roadblock! Can your party deal with this growing problem and survive? This adventure is for a group of 4th - 6th level adventurers set in the land of Filbar. This adventure can be modified to fit any campaign setting and can be used as a fill in adventure.