Countess Thun asked the famous New York detective Nick Carter to travel to Prague, for assistance to solve the strange case of a missing dog.

Mysterious murder cases happen during the investigations, done by the malicious botanist Baron von Kratzmar and his carnivorous plant Adela.

He called himself "the Gardener" a notorious criminal, who Nick Carter thought had died in the swamps years ago.

With the help of bizarre inventions, Ledvina and Carter succeed in catching von Kratzmar and delivering him to the legal authorities.

Sheila Benson wrote in Los Angeles Times: "This spoof on detective Nick Carter is crammed with invention, wit of the highest order, exquisite tongue-in-cheek performances and all the art noveau([sic]?)