Publisher's Synopsis
Frank and Joe race to Seattle to help their father, Fenton, who stands accused of murder! In their father's rented house they are met by burglars who try to gun them down. When the brother detectives follow their trail, they learn that valuable timber is being destroyed by a deadly virus. They also find an entire town has been sealed off to prevent a mysterious flu epidemic. Meanwhile Fenton Hardy is the hostage of a sinister scientist and if the brothers can 't reach him in time, he'll be the victim of an evil experiment.
