The Professor is indulging in a vicious blackmail racket upon four big business men he has tricked into a phony trust that has led several of them to commit suicide rather than pay up. When a Herman Bates commits suicide, the Green Mask looks into the matter and ferrets out the rats responsible.; Arriving in Florida, The Moth runs into a terrible storm and discovers a resident who informs him that a group called The Weather Kings are responsible, and they plan to use the weather to control the nation. Discovering the group's weather plant, The Moth destroys the control board and plant.