Our hero Britt Reid, otherwise known as The Green Hornet, gets a leads that causes him to investigate the Kolten Munitions Plant. A visit to the plant proves unsatisfactory. As The Green Hornet, he calls on the Plant Superintendent at his home and learns a Crime Syndicate has defrauded the stockholders and just sold the plant to a foreign government for half a million dollars. The Hornet covers the Superintendent and his assistant, but they escape. The Hornet pursues, overtakes and is battling the Superintendent when they approach a bridge that is making way for a passing ship and their car flies off the bridge! Will the Green Hornet escape with his life? Will he lose the Superintendent in the confusion?