On a college campus, young men are dying of heart attacks. According to witnesses, they are last seen with young women who apparently died shortly before meeting the men. When Kolchak investigates, he finds that the men were associated with Professor Spate, who is researching an ancient Middle East tablet, and that a series of similar deaths plagued his expedition to recover the tablet. The tablet is tied to a supernatural creature known as a succubus, who possesses young women at the moment of their death and then reveals her true visage to men, frightening them to death and feeding upon their energies. Kolchak must destroy the tablet to destroy the succubus once and for all.

Une femme tue des étudiants en provoquant l'éclatement du cœur. Kolchak découvre que la femme est un succube femelle.

Mordfund auf dem Campus von Illinois. Während seiner Ermittlungen kommt Kolchak auch die gewitzte Reporterin Rosalind Winters in die Quere. Weiß sie mehr, als sie zugibt? Unterdessen macht Prof. Spate eine merkwürdige Entdeckung und Kolchak liest etwas über Asmodeus ...

Carl Korchak (Darren McGavin) é um jornalista que trabalha para o Chicago's Independent News Service, investigando diferentes casos para suas matérias, ele sempre acabava envolvido com fenômenos sobrenaturais. Porém, não importava quantos vampiros, lobisomens, demônios ou seja lá que outras criaturas misteriosas cruzassem seu caminho, ele nunca conseguia convencer seu editor da realidade daqueles acontecimentos.