Mary Brooks' father, who has been studying ancient tribes, falls into the hands of "the people of Zar, god of the Emerald Fingers." Tarzan helps Mary locate her father, rescues everyone from the High Priest of Zar, and takes Mary to his cave.

At a mountain resort, Kenneth Scott falls in love with Marie Beauchamp, an older woman who merely amuses herself with him. When she deserts him to open a roadhouse, he sadly leaves the mountains and, in the company of an old wandering poet named "Doc" Podden, travels to a little village in the woods.

A kindly but desperate Alsatian innkeeper named Mathias murders and robs a rich Jewish merchant staying at his inn, but the ghost of his victim will not let him rest. Meanwhile, a mysterious Mesmerist has come to town, claiming he has made many criminals confess their crimes...

The story is set in Cambodia in the years following WWI. An evil count has come into possession of the secret methods by which men can be transformed into walking zombies and uses these unholy powers to create a race of slave laborers. An expedition is sent to the ruins of Angkor Wat, in hopes of ending the count's activities once and for all. Unfortunately, one of the members of the expedition has his own agenda.

Made by re-editing a deteriorated nitrate print of The Bells (1926), starring Lionel Barrymore and Boris Karloff, this work shows the fragility of the film image while foreshadowing the Holocaust.