Thief King's Vault (5E)

From the back of the book: It has long been said there are no thieves in the city of Caltoshar. At night, one can safely walk the streets, and few worry about locking their doors. Yet one would be foolish to believe Caltoshar is without a criminal element, for there are thieves aplenty if one knows where to look. The best advice would be for you to assuage your curiosity with such matters, and enjoy Caltoshar for what it appears to be. You're probably not one to take wise counsel, though. The Thief King's Vault is a short adventure for six 5th-level characters. Players can use their own characters or you may run it straight out of the box using the pregenerated characters in the appendix.