Into the Unknown is an introductory dungeon crawl for 1st to 3rd level PCs. The party finds a map leading to the lair of two lost adventurers, Rogahn (the fighter) and Zelligar (the magic-user). The module is intended to teach notice DMs how to create a dungeon by requiring them to stock the complex with monsters and treasures, chosen from the provided lists of options. There are a a number of fanciful elements, like a wizard's lab and a room of pools that cause various random magical effects when their water is imbibed.