Sir Borotyn, a prominent Prague resident, is discovered murdered in his home, with all indications pointing to a vampire assault. The victim's friend, Baron Otto, and the physician who analyzes the body are certain that the vampire is the mysterious Count Mora, or perhaps his daughter, but receive little help from the law. Professor Zelen, an expert in the occult, is called in to assist with the investigation.
The relationship between an aspiring dancer and a popular songstress provides a retrospective of the great African-American entertainers of the early 1900s.
The plot concerns a comet hurling toward Earth on a collision course and the different reactions to people on the impending disaster.
