A Faceless Enemy

From the PDF:

This adventure is suited for 4–8 characters of 5th level. The characters are hired to escort a caravan across the Dol Minor Wastelands to the fortress of Harkanis Bek. The road is perilous and the supplies desperately needed by those awaiting delivery, the Knights of Tal Abastion. However, this seemingly simple task embroils the adventurers in an epic struggle as war rages across the wastelands. The adventurers may learn of a vile deception and uncover a sinister plot to rewrite the history of the Third Age and undo the defeat of the Abyssal Lord Ereshal.