Synopsis Our hero Britt Reid learns that the men killed in the tunnel disaster were insured in the construction company's favor, through a broken named Mortenson. Masked as the Green Hornet, Reid locates Mortenson, but before he can force him to confess, Axford and the police arrive and the Hornet has to flee. Monroe, acting boss of the rackets, orders Mortenson to destroy all papers and leave the country. The Hornet and Kato pursue Mortenson, who boards a train. The Hornet leaps aboard after him. Will our hero be able to stop the evil Mortenson before he can leave the country?