There are three subplots: the monster's egg that is ready to hatch, a scientist who wants to capture the beast, and a mysterious sunken Nazi bomber plane which the military is trying to cover up.

A Scottish scientist, George Sanderson, finds help from an American sonic expert, Spencer Dean, to team up and hunt for the monster.

Professor Pratt and his team end up finding a sunken World War II German bomber before retrieving the monster's egg.

Although Professor Pratt and his team successfully retrieve the egg, the monster ends up killing his assistants.

The film was made on an infamously low budget and on location at Lake Tahoe, California, whose surrounding countryside passes poorly for Scotland.