Brian Woodville is an adventure journalist who has investigated odd stories from all over the world, most recently the deep Amazon. He is assigned a strange story in the Black Forest of Germany involving mysterious deaths and giant bats.

He sets out to discover the truth about these apparent vampiric attacks in the bucolic village of Baden-Baden. He encounters reticent locals, strange foreigners, and a beautiful noble woman. And a voice from nowhere tells him that he has three days to leave Baden-Baden, with the implied threat of personal peril.