Synopsis: Insane with the desire to avenge his daughter's death, Dr. Boris Karlov plots a sinister scheme of revenge against the family he holds responsible. Overwhelmed by grief, Karlov blames the Petrov family, a clan of nobles he believes drove his daughter to her death. Corrupt and cowardly Prince Gregor Petrov had given Karlov's daughter a mysterious necklace known as The Drums Of Jeopardy, which is rumored to have deadly powers. The scientist uses the necklace and its jewels as messengers of death when he begins to hunt down members of the doomed family.