In a distant land polluted by an alien menace from beyond the stars, a great cancer grows within the earth. As its tendrils reach out through the dreams of those who learn and study its existence, a sinister cult grows more active in preparing the way for a devastation that will destroy more than the minds of would-be heroes. Can the adventures reclaim lost memories in time to stop the advance of a cataclysmic contagion that could threaten all of Golarion? Can they resist the mind-shattering truths revealed by the Yellow Sign, and the monstrous force it symbolizes? The Strange Aeons Adventure Path pits the heroes against the cosmic horrors of the Cthulhu Mythos, with new monsters, mind-shattering terrors, and explorations far beyond the known lands of Golarion.