A Stolen Song
The astronomer monks of Farsky failed for decades to tell the future by the stars. Desperate, they found a promising seer, and passed off her predictions as their own… until deadly illness struck. Unable to give up their lucrative scam, they trapped her spirit, which became a thing of evil: a banshee, whose howls foretold their doom. The party have heard rumors of a ruin, where once sages could answer any question…
Notes by @Demian:
Winner of One Page Dungeon Contest (OPDC) 2015. The adventure consists of a single small dungeon with 13 rooms and an exploration/time-based random Silence spell mechanic. It is themed around music and sound. Designed as a one-shot to be played in one 4–7 hour session.