From the introduction:
This adventure takes place in the City of Waterdeep found in the Forgotten Realms Campaign Setting. However, it is a stand-alone module that can be placed in any city environment that fits your home campaign. In this adventure, the PCs are hired to locate a missing family member who has ventured into the fabled catacombs. Before the dungeoncrawl can begin, the PCs need to discover the password and location of the entrance. This adventure is designed to be easy to play. It is printer-friendly and contains all the monster statistics you need in an easy to read format. It introduces several new NPCs and unique magic items. Designed for a well-rounded party of 8th level characters, the module can take 3-4 nights of play to complete.
A multi-night adventure for 8th level characters