Powerful evil creatures have been imprisoned in a magical dungeon for a millennium. But over time, the magical protection has worn thin, and the monsters are about to escape and wreath havoc on the nearby town of Puestosombrio. The players are entering the dungeon to defeat the ancient evil and save the town. The players explore the dungeon, which is laid out from cards. When they meet monsters, they can attack them, using their personal stats and equipment to modify their single die roll. Defeating monsters lets the players collect new powers and gain treasure, but the final boss monster also gains strength throughout the game. The goal is to eventually defeat this boss monster.