A demented archaeologist discovers a living, breathing serpent creature known to the Aztecs as Quetzalcoatl and accidentally kills his wife by giving her one of the beast's feathers, causing the creature to track her down and slaughter her. Using this knowledge he exacts revenge upon his enemies by placing one of the feathers on his intended victim and letting the beast loose to wreak havoc.

George Zucco
as Prof. Andrew Forbes

Hope Kramer
as Mary Forbes

Ralph Lewis
as Richard Thorpe

Eddie Acuff
as Jerry 'Jonesy' Jones

Wheaton Chambers
as Louis Havener

James Metcalf
as Dr. Lambert

Henry Hall
as Sheriff Bill Hayes

Milton Kibbee
as Hastings (as Miltin Kibbee)

Budd Buster
as Head of Inquest

Terry Frost
as Vance Bennett