The Drums of Jeopardy plot
"AN OMEN OF DEATH...Every victim receives a warning before the mad scientist strikes"
Mad with desire to avenge his daughter's death, Dr. Boris Karlov hatches a sinister plan to exact revenge on the family he believes is responsible for her death. Karlov accuses the Petrov family of being responsible for his daughter's death. Prince Gregor Petrov once gave Karlov's daughter a mysterious necklace known as The Drums of Jeopardy, which is said to have deadly powers. The scientist uses the necklace as a messenger of death as he hunts the members of the family.