It is believed the Goddess of Winter Auril has chosen to empower certain minions in the preservation of this everlasting winter, the Rime of the Frostmaiden, including the vicious Yeti native to the tundra and heights of the Icewind Dale. Indeed, the north and northeast faces of Kelvin's Cairn have recently become more perilous due to savage attacks by an enormous monster that has become known as the Red Yeti, as it is so thoroughly stained in the blood of its victims.
To hunt down this common threat, a temporary peace had been called between the goblins of the Karkolohk fortress on the northeast side of Kelvin's Cairn and the people of the town of Termalaine.
Meanwhile, a secretive group of magical investigators of the Rime (the "Kalteswetteruntertgrund") hired some explorers to place a magical sensor high up on Kelvin's Cairn, so they could perform research into the strange ongoing-winter weather. Tragically, the group had selected a path that intersected the Red Yeti's territory.
Result
Members of the Sewer-side Squad successfully returned to Termalaine with the head of the Red Yeti. The head was needed to gain passage to Karkolohk, to determine whether the story told by Dzaan is in fact true (see: Hostage King).
In the process of the hunt, the party was able to rescue one of the explorers hired by the magical investigators, a halfling cleric of Yondalla named Perilou Fishfinger. The party was also able to successfully install the the magical sensor - but the rest of the expedition died on the mountain: Garret Velryn (rugged human tracker - killed by yeti), Barthoom Hammerhome (dwarf explorer - killed by yeti), and Astrix (Tiefling divination wizard, frozen to death hiding from yeti - found next to Barthoom's body). Perilou was to return to her organization and report the results.
The party received a bounty for the yeti and a payment from the researchers.
(See also journal: Grim Trophy)