The Green Hornet Strikes Again!

While on a vacation in Hawaii, racketeers install one of their men on Reid's newspaper as Managing Editor. The criminals also send a gunman to prevent Reid's safe return home.

A lead prompts Reid to investigate the Kolten Munitions Plant, with no results. Reid then calls on the Plant's Superintendent at home and uncovers a crime syndicate's devious plan.

Britt Reid learns that Frances Grayson, heiress of the Aluminum Product's fortune, is being victimized by racketeers. But there is more to the story than meets the eye.

Determined to seize control of Aluminum Products Company, racketeers plan to cripple Home Electric, the company supplying the Aluminum Products Company with power.

Crogan, leader of the racketeers, sends Deluca with a crew to run rifles over the border. Axford and Lowry become involved in an accident with the truck transporting the rifles.

Britt Reid sends two of his reporters to search the wreckage of a bombed warehouse where they discover evidence linking the warehouse to Grimbolt Steel Mills.

While continuing his investigation into Grimbolt Steel Mills, Britt Reid learns that Dr. Bedloe worked with Weaver on the anti-aircraft bomb responsible for many accidents.

Desperately in need of quick cash, Crogan is inspired by an idea he gleaned from an article in The Sentinel. Reid sends Axford to guard Frances Grayson, the victim in the article.

Infuriated by an article in The Sentinel exposing his band of racketeers, Crogan turns up the heat on Reid's newspaper. Soon, hoodlums attack a Sentinel delivery truck.

Britt Reid and his staff rejoice over a report that an oil well they helped John Fulton finance will prove lucrative. However, Fulton soon bursts into Reid's office with bad news.

A considerable amount of auto thefts prompts Britt Reid to take Miss Case and Axford to investigate a dangerous roadhouse that is notorious for racketeering activity.

Britt Reid suspects a conspiracy to defraud insurance companies is afoot when a third warehouse reported to contain military supplies is destroyed by a fire.

Britt Reid learns that Foranti, the head of the Builder's Association, is stealing Association funds. As The Green Hornet, Reid confronts Foranti, but Foranti calls in Breedon.

After The Green Hornet narrowly escapes with his life, clues pointing to the syndicate's top brass arrive at Reid's desk prompting him to set up an interview with Crogan.