Aided by their new Yithian ally, the investigators have cornered the cultists of the Crawling Chaos! Now they must defeat them and possibly rescue the captured prisoners held by the cult. Even if they get past the fanatical cultists, the leader, a brilliant scientist and sorcerer, awaits in the depths of the Great City, tampering with cosmic forces. Is the end of their long struggle? What is the cult's ultimate plan? Find out in this exciting episode!