Rosemary Glosz

Sir Borotyn, a prominent Prague resident, is discovered murdered in his home, with all indications pointing to a vampiric assault. The victim's friend, Baron Otto, and the physician who analyzes the body, are certain that the vampire is either the mysterious Count Mora or his daughter. Receiving little help from the law, occult expert Professor Zelen is sought to assist with their investigation.

Mary Barrett is an aspiring opera singer who is taken under the wings of a famous operatic maestro, Guilio Monterverdi. After spending endless working hours together and arguing, their relationship develops into love. But, jealousy and misunderstandings prevent Mary and Guilio from acknowledging their true feelings.