Tunnel Rats

From the introduction: The quiet little town of Cimbus is not so quiet as of late. The children of the townsfolk are going missing and nobody can figure out where they're going or how to stop them from disappearing. A wandering band of heroes passing through town on their way to adventure is the town's only hope. Can the heroes discover where the children are disappearing to and bring those responsible to justice, or will Cimbus become a ghose town? An adventure for 1st-level characters. Note: This adventure was only released to Wizards of the Coast's "premiere" stores for in-store play.