A Tong war divides Chinatown, and The Green Hornet hopes to divide the conspirators. Meantime, a growing antagonism between Tong leader Lo Sing and Kato jeopardize the Hornet's plans.
After years of battling each other, Phil Trager and Steve Gant plan to merge their criminal organizations into one mob. The Green Hornet plans to use reporter Mike Axford as bait in order to sow distrust between the two gangsters and rupture their budding criminal alliance.
The gangster who murdered Britt Reid's father returns to the city, after faking his death. A sleazy private investigator is murdered before he can deliver proof, so The Green Hornet picks up the investigation.
On the eve of the election, District Attorney Frank Scanlon is marked for assassination by a political rival. When Scanlon considers resigning, The Green Hornet fears losing his trusted ally.