An alien being, dark omens, and vanishing ships send the adventurers to a mysterious island newly appeared in the Sea of Swords. But can the characters uncover the mysteries of the Changing Island in time to save Faerûn from a terror from another plane? A dark fantasy adventure for characters of 11th to 13th level.

In a distant dimension of existence, a collective of Modrons run experimental tests to find the answer to one question: What draws adventurers to places known as "Dungeons"? Hijacking the travel of adventuring parties, these Modrons subject them to a series of tests in their artificially created dungeon. Deadly combat, logic puzzles, "moral" challenges, and a plot about a kidnapped "Maiden" Modron by an "Evil Wizard Construct" can be found within. But not all is as it seems... Leading the experiment is a rogue Modron officer named the Creative Director, who has gone mad and morphed the tests into an elaborate death trap for adventurers. Seeking revenge against those it considers responsible for its “imprisonment”, it pits the adventurers against ever escalating challenges. Who will defeat the Creative Director and put an end the mad tests?