After the Green Hornet prevents the assassination of a Prince Rafil, his blonde American fiancé, Janet Prescott is kidnapped and the prince is ordered to abdicate in order to save her.

Britt Reid must figure out how to get medical attention for a wound he received as the Green Hornet and stop two cops who are using silent alarm calls for their own profit.

A charity art auction of fine paintings at Britt Reid's home is interrupted by three masked criminals, who unleash a laser ray with devasting results. The Green Hornet and Kato find themselves in quite a confrontation against this roving killing machine.

"The Sally Bell" a cargo ship with $2 million in narcotics en route to the U.S. from Hong Kong, is initially lost with her crew at sea, now mysteriously shows up at a salvage yard. The only survivor, Gus Wander, knows "The Secret" of her special cargo with only one big problem -- he's currently unconscious.