Gateway to the Savage Frontier

The party of adventurers has just escorted a caravan from the dwarven-ruled citadel Adbar to the city of Yartar. Now it's time to relax - the heroes head to the nearest tavern for food and drinks. However, somebody slips a drug into their food, and they all pass out. Upon awakening, they discover that they have been robbed of nearly all their possessions. The heroes must now begin everything from scratch. Investigating the matter, they unravel a much bigger and more sinister plot, which involves the evil organization Zhentarim and their plans for conquering the land.