Our hero Britt Reid, suspects a conspiracy to defraud insurance companies when the third warehouse reported to contain military supplies is destroyed by fire. As The Green Hornet, Reid calls on Crawford, the warehouse owner, and forces him to confess that merchandise is removed from warehouses before they are set fire. Forcing Crawford to give him the location of a warehouse scheduled to be burned that night, The Hornet races to the warehouse, gains entrance and is making a hasty inspection when he is ambushed. Will our hero prevent the building from burning down? Will The Green Hornet be destroyed in the fire?