Tales from the Blood Plateau: Race to the Yellow Lotus is an adventure for 4th- to 5th-level characters. From the back cover:

The Race is On!

An army on the move, an ancient artifact, its purpose long forgotten, and the sinister plans of an unknown foe: When these elements combine, it's bad news for the good-aligned cities of the Blood Plateau. A massive band of orcs is marching on the Monastery of the Yellow Lotus, intent upon taking the "Flower That Does Not Bloom." The heroes must trek through goblin-infested tunnels and monster-filled woods ahead of the orcish horde, in a deadly Race to the Yellow Lotus.

Race to the Yellow Lotus is the second adventure in the Pale Knight series. It can be played as a sequel to The Lost Outpost or as a stand alone adventure.