Plot:
First the screen crawls about the dangers of the mandrake root and how its powers are used. Frank tries to a pay a visit to his uncle's mansion. However, the butler refuses to let him in. The scientific uncle is at a convent looking for his daughter that disappeared.
You have no idea how many Singing or Flying Nun jokes I've had tolerate...
Frank tells his buddies about how he saw a girl at the mansion. They all head back to look for her.
Frank discovers the girl, Alraune, is his uncle's daughter. She wants to meet Frank later.
Scientist uncle finds Frank who wants to borrow some money. Asking about the cousin, Frank is positive she's not a cousin. He storms out of the mansion. Later, Alraune is told about her mother.
Frank meets with the Princess and Olga. She warns him to avoid Alraune and how his uncle's medical license was removed and how he was fired from the university. That is why uncle is so against Frank. The princess offers to pay Frank's college bills provided he goes to Paris.
Frank visits Alraune who offers to go with him. The butler spots them together and later informs uncle-scientist who offers to pay Frank's bills. Scientist reveals to Frank that he created Alraune through artificial insemination. Her mother was a lady of easy virtue, and her father was a killer. Her personality is pointing to a criminal activity.
Before leaving for Paris, Frank warns his buddies about staying away from Alraune.
Uncle gets so tired of Alraune's attitude. He hires a governess for her. Alraune learns that Frank left for Paris the previous night. Alraune convinces her father to buy the maid's land for its sulfur water. Uncle plans to get the Princess to help invest and build a resort on the site.
Alraune talks with Olga who loves Frank. Alraune does some talking about how pining away and somehow Olga commits suicide that night. Scientist suspects that Alraune was behind it.
Later, on a ride with a guy, Alraune returns alone.
How I got caught in a fishnet is quite a funny story..
Scientist isn't happy with his "daughter's" attitude. She flirts with one of the hired hands and then something happens to him, too.
Some people find the hired hand dead from a riding accident. Alraune is tired of the governess and wants her fired. She gets the butler to help her. A missing necklace strangely gets in the possession of the governess.
At the grand opening of the resort, the ballroom dancing ensues. Alraune has a couple of guys pining away for her. She spots Frank who's returned with his medical license and asks why he left her. Alraune wants Frank to help her.
Butler threatens to blackmail his boss. Alraune tells her father she plans to run off with Frank. He finally tells her how he "created" her and that Frank left after he learned.
Scientist wants to take Alraune away to Paris. Princess is mad that she's not got her investment money back. Alraune runs off with Frank following her. She tries to get Frank to leave. He tries to explain that she's not evil. Scientist shoots Alraune so no one else could have her. Cut to the gallows march to the good scientist.
