Teenager Trudy Morton, who lives with her uncle Carter Morgan, has nightmares in which she is a monster running about the streets. Her boyfriend Johnny Bruder dismisses them. Unbeknownst to Trudy, she actually does turn into a monster at night, than…
Teenager Trudy Morton, who lives with her uncle Carter Morgan, has nightmares in which she is a monster running about the streets. Her boyfriend Johnny Bruder dismisses them. Unbeknownst to Trudy, she actually does turn into a monster at night, thanks to Carter's lab assistant Oliver Frank. He lives with them and has been spiking Trudy's fruit punch with the formula that he and Carter are developing at the home lab. Carter's goal is to eliminate all disease so that people can live forever; Oliver's goal is different: with the help of Elsu the gardener, he is assembling a "perfect being", for Oliver Frank is actually Oliver Frankenstein, grandson of the original Dr. Frankenstein.
Carter's project stalls and he breaks into Rockwell Labs for Digenerol, the chemical he needs for his experiments.
Police Lt. Boyd and Det. Bill Dillon investigate a report from a frightened woman that a monster in a swimsuit attacked her. They spot Trudy's monstrous self and fire at her, to no avail. Oliver grabs her and drags her home to recover.
The next morning, Carter asks Oliver if he has seen the newspaper story about a "Frankenstein monster" on the loose. Oliver scoffs at the story, but when Carter disparages the Frankensteins, Oliver jumps to his feet in their defense. Boyd and Dillon are visited by Mr. Rockwell of Rockwell Labs. Rockwell says the stolen Digenerol may be somehow related to the monster issue.
Back at the home lab, Elsu mistakenly enters through a secret door while Carter and Oliver are working. Oliver shoos him out and to distract Carter knocks the bottle of Digenerol from his hand, spilling every drop. Carter says he must now steal more Digenerol.
Trudy's friend Suzie Lawler visits her, and they quarrel. While flouncing off, she makes a date with Oliver. The date goes badly, with Oliver attempting to force himself on Suzie. Since he needs a brain for his creation, he runs Suzie over with his car, killing her. When Elsu asks why he wants to create this creatur..
