Reporter Patsy Reynolds (Robin Raymond) and photographer Eddie Porter (Frank Jenks) are assigned to interview John Foster (Davison Clark), head of the Emmerson Foundation regarding a listening device the organization is working on. Foster evades them and they go to the lab to see Professor Reynolds (H. B. Warner), the real inventor. Soon, they are involved in several shootings, blueprints that change hands several times, a corpse in their car that appears and disappears a few times, the loss of their jobs and several people who either think they are killers or candidates for being killed.