According to a report in The Moving Picture World, "Mighty buildings, rocks and forests are set afire and exploded.

[3] The serial begins, as described in a film magazine,[4] with the two keys to a box that contains the source of the rays which, if concentrated, are powerful enough to destroy the world.

Jack Stone (Sherrill) loves her, but on the night of their planned elopement Mystery is kidnapped for the key she wears, which falls at the door of the minister.

In a thrilling chase through underground chambers the young woman is rescued, only then to fall back into the hands of her enemies.

Later serial chapters reveal Marianna, the Crystal Gazer (Uzzell), as the mother of Mystery, and her father turns out to be her pursuer, attempting to gain possession of the box and its key.