Britt Reid, daring young owner/publisher of "The Daily Sentinel," dons a mask and fights crime as The Green Hornet. While the police and public believe the Hornet to be a ruthless criminal, the District Attorney knows Reid's secret identity, and welcomes his assistance in fighting racketeers and criminals. Also assisting Reid in his crusade are his secretary, Lenore Case, and his faithful valet, Kato, who is a kung fu expert and who drives the sleek "Black Beauty," the Hornet's well armed car.