Ted Riley, a government agent, is sent to investigate strange occurrences on Diamond Island, where he uncovers a plot by a fake Major Gray to create a new type of secret gas for personal gain. After his boat explodes, Riley is rescued by Gray's men and discovers that a chemist, Professor Baker, and his daughter Anne are being held captive on the island.
Rip Roaring Riley
Ted Riley, a G-Man, is sent to investigate mysterious occurrences on Diamond Island, where he discovers Major Gray allegedly producing a new type of secret gas for personal gain.
