The nefarious Dr. Fu Manchu searches for the keys to the tomb of Genghis Khan, in order to fulfill a prophecy that will enable him to conquer the world.
Danish movie poster or Perils of Nyoka is a 1942 Republic Movie serial directed by William Witney. It starred Kay Aldridge as Nyoka the Jungle Girl, a character who first appeared in the Edgar Rice Burroughs-inspired serial Jungle Girl. (Wikipedia).