When the teenagers in a small Illinois town start getting murdered, the police chief makes a connection to the mysterious scientific experiments being done at the local university and must stop them before his own son is dragged into the deadly scheme.

In the days after the attack on Pearl Harbor, panic grips California, where a military officer leads a mob chasing a Japanese sub.

On the way to California, a family has the misfortune to have their car break down in an area closed to the public, and inhabited by violent savages ready to attack.