This film concerns some Utah residents who reopen a silver mine that was closed in 1912 after a mysterious cave-in. When locals probing the shaft end up dead, it is discovered that they were killed by a pack of tentacled, leechlike monsters that reside in the mine. The incoherent plot
merely serves to dilute whatever power this old-fashioned 1950s-style horror movie may have had, and it's a long wait to see the monsters, which aren't fully unveiled until the very end.
