Escape from the Dragon's Lair

From the introduction: You've broken the first rule of adventuring... never split the party. You cautiously wander down a long hallway looking for your companions; or at least for a way out of the dungeon. You enter a large, cavernous room and the door slams shut behind you. Sitting a top a small mound of gold, jewels, and what are presumably the charred remains of your fellow adventurers is a Large Red Dragon.