An experiment in dream suppression goes horribly wrong, and the subject manifests a Cajun legend from his childhood--Peremalfait--to kill the people that he hates. Unfortunately, Kolchak becomes the next target when he threatens to unplug the subject.

Roosevelt Heights has certainly seen better days. One problem the Jewish neighborhood has experienced lately is a rat infestation, which has led to several fatalities. Another is an elderly Hindu man, drawing swastikas everywhere. These two problems turn out to be connected, and the horrible truth behind the rat attacks nearly costs Carl his life, and forces him to kill the person he trusts the most.