From the description:
Ulthurus, an adult white dragon, has recently made its lair in the remains of Icefang Fortress in the Bladespine Mountains. From its new roost, it's been accosting traveling caravans and nearby villages leaving icy destruction in its wake. To make matters worse, a tribe of kobold zealots have come to worship Ulthurus and have begun raiding settlements and attacking passersby in the hopes of acquiring more wealth for their new master. Recently, a prized relic was stolen from the house of the mayor of Hornsmeet by a small group of the kobolds and the mayor desperately wants it back... along with the head of the dragon before it freezes his village solid. In exchange, he's offered 5,000 gp along with whatever the dragon has in its hoard, aside from the relic.