This is a high level dungeon for players that are 12th level plus. The number of players can be anywhere from 4-6.
The players are called to help a town from a dragon that has been attacking with terrible force. The players are known as heroes throughout the land and of course will help the player. They spend the next few days waiting. Nothing. They spend a few more days searching. Nothing. They begin to wonder if the dragon has gone away. They come across finally on a large cave. Inside the cave is a group of men sitting around a fire. The cave smells horrible. Rotting behind the group is the dragon that has been terrorizing the town. Seems like someone has beatin them to the punch. They approach the other party and find out that they are thieves. Why did they kill the dragon? Why would they care about the town? Maybe the dragon has a large hoard of treature? But, where is this treasure? The thieves scatter as the corpse comes to life. The players are introduced to a Draco-Lich for the first time.
The thieves were hired by the dragon to take certain items in the city while he attacked. The dragon caused the confusion, and the thieves did their job. The dragon will attack without regards to the thieves. If they get hurt in the crossfire, oh well.