Warren has taken two Mexican films, The Aztec Mummy and a horror comedy entitled The Castle of Terror and edited them both together along with some of his famous insert shots and made one hell of a mish mash film.
Two mummies are discovered and one turns out to be a werewolf which happens to kill a few people. Lon Chaney, Jr. portrays the wolfman and it's interesting to see him again in this footage. His scenes are from Castle Of Terror.
This is a really confusing film that makes no sense whatsoever, but it somehow is fun to watch, maybe because it is so inept.
The film run 59 minutes so it is essentially painless, but God, why did Warren do this anyway? If you have an hour to kill and you want to see Chaney in a final performance as a werewolf, here is your chance.
I will say Warren could make bad movies like nobody else.