Candlekeep Mysteries/Shemshime's Bedtime Rhyme

"Shemshime's Bedtime Rhyme" is a short adventure module for 4–level players, collected in the anthology Candlekeep Mysteries, where players are trapped in the Firefly Cellar of Candlekeep as they deal with a curse.

Synopsis
In 1492 DR, a group of adventurers spend the night in the Firefly Cellar below the House of Rest in Candlekeep. When a curse that forces its victims to hum a rhyme begins afflicting them, the adventurers and scholars present are locked inside the cellar for safety. The characters must discover how the curse is connected with the sinister tome titled Shemshime's Bedtime Rhyme.