From the front cover:
Originally designed as a convention tournament module, this adventure sends the heroes into the underdark to do battle against the mysterious denizens of the deep! A drow housemistress commissions the characters to acquire a mysterious weapon known to be in the hands of her dark elf enemies. Locating, identifying, and acquiring the magical weapon leads the heroes on a great trek across the underdeep, where they must battle svirfneblin, a powerful lich, and enemy drow. This adventure is specially designed for play by drow characters, but can be used with any adventuring party. Pregenerated drow characters are included.
An adventure for character levels 7-9.