From the Front Cover:
The Iron Route, an important trade road east of Phlan, is beset by competing bandits. An exiled Black Fist officer leads his band of mercenaries turned cloaked ruffians, while a mysterious dragonborn sorcerer commands screaming savages from the north. In this war over the trade route, the beleaguered merchants are the victims, and Phlan suffers from a lack of supplies. It's up to adventurers to strike out and reopen this vital route. An adventure for 1st-4th level characters.
From the Introduction:
Welcome to Outlaws of the Iron Route, a D&D Expeditions adventure, part of the official D&D Adventurers League organized play system and the Tyranny of Dragons storyline season.
This adventure is designed for three to seven 1st-4th level characters, and is optimized for five 2nd level characters. Characters outside this level range cannot participate in this adventure. Players with ineligible characters can create a new 1st-level character or use a pregenerated character.
The adventure is set in the Moonsea region of the Forgotten Realms, in the town of Phlan and west along the Iron Route, a major trade route through the area.