A batty Scottish professor attempts to prove the existence of the Loch Ness Monster, but everyone thinks he's crazy. Meanwhile, a foolish young reporter attempts to get a scoop on the story.

Seymour Hicks
as Professor Heggie

Nancy O'Neil
as Angela Heggie

Frederick Peisley
as Jimmy Andrews

Gibson Gowland
as Angus

Eric Hales
as Jack Campbell

Ben Field
as Piermaster

Hubert Harben
as Prof. Blenkinsop Fothergill

Rosamund John
as Maggie Fraser

Robb Wilton
as Reporter

Fewlass Llewellyn
as Scientist at Meeting