A San Francisco airplane bound for South America crashes, and among the scorched debris is found a shrunken native human head, neatly packaged. The perplexed police contact a local anthropology museum about this unclaimed piece of grisly baggage, where they intersect with Jack and Doc, two private eyes, called there to meet a mysterious woman who had a case for them and wanted to meet in private.
Jim Bannon
as Jack Packard
Anita Louise
as Janet Mitchell
Michael Duane
as Rex Kennedy
Barton Yarborough
as Doc Long
Paul E. Burns
as Leon Hartman
Thomas E. Jackson
as Det. Capt. Quinn
Mona Barrie
as Louise Mitchell
Frank Wilcox
as Prof. Arthur Logan
Richard Hale
as Curator Raymond Halliday
Ludwig Donath
as Dr. Karger
Mary Newton
as Nurse
Edward Earle
as E. R. Willard
