Tales from the Blood Plateau: The Lost Outpost is an adventure for 3rd- to 4th-level characters. From the back cover:

A Bloody Beginning

Storming a fortress is never easy. Especially a fortress full of smart, disciplined orcs. But that's just what you'll have to do in The Lost Outpost. In this, the first installment of the Pale Knight series, these uncouth humanoids have seized a long-abandoned elven outpost in the Dragonspine Mountains. It seems to have no tactical value, but the elves are taking no chances. You've been hired to clear it out.

How do you go about assaulting a manned, fortified stronghold? Why do the orcs want it in the first place? And just who taught orcs to fight like soldiers?

Maybe you'll find the answers to these questions, or maybe you'll find a grisly death at the hands of a den of orcs!