Dr. Crippen lives
The young Fleur Blanchard is terribly worried: her parents were poisoned in the jungle by the mysterious Dr. Crippen, who had tried to get hold of a serum which Blanchard had discovered. Fleur's bodyguard, a police- man, is murdered, another attack fails. Then Fleur gets news from her father's lawyer in Amsterdam. She goes to Holland. Worried about her security, inspector Steen takes her to a boat. But Dr. Crippen is there, too. When he demands her father's papers, Fleur realizes that he is an old acquaintance. They fight to the death.