A quiet little town, where for generations the people have gathered on Midsummer's Eve to decorate a cave with ,flowers, echoing ancient Druid customs. And there comes an evangelist--a spellbinder to halt this pagan activity. First he puts a stop to dissent. Then he enters the pit to vanquish the forces that lurk there... Only a few resist him, battling the rising fanaticism of the town. Only a few understand what really happens in the pit. Only a few worry about the spreading darkness and the nearness of the nuclear missile base...