Sam Bisbee is an inventor whose works (e.g., a keyhole finder for drunks) have brought him only poverty. His daughter is in love with the son of the town snob. Events conspire to ruin his bullet-proof tire just as success seems near. Another of his inventions prohibits him from committing suicide, so Sam decides to go on living.

Two dumb soda jerks dream of writing radio mysteries. When they try to pitch an idea at a radio station, they end up in the middle of a real murder when the station owner is killed during a broadcast.

In this action film, a courageous test pilot works with experimental aircraft for the US Armed Forces. When an important airplane manufacturer dies, his daughter is left to run the company. The company seems to be producing dangerous prototypes, so the woman decides to close the company.

Ulysses Crickle owns a small town grocery store, doubling as the post office, dealing with the peculiarities of the townspeople. Jerry Fleming arrives to run a rival business and to romance Crickle's granddaughter Marian.

Frankenstein's unscrupulous colleague, Dr. Bohmer, plans to transplant Ygor's brain so he can rule the world using the monster's body, but the plan goes sour when he turns malevolent and goes on a rampage.

A scientist working on cures for rare afflictions, such as a bone softening agent made from molds to allow him to correct the spinal deformity of his nurse, finds the physical causes of lycanthropy in wolf-man Larry Talbot and of vampirism in Count Dracula, but himself becomes afflicted with homicidal madness while exchanging blood with Dracula.