 Under the name "Lenny Frazier", typhoid carrier Leonard Forbes obtains a job on Hank Dooley s farm. When Dooley s young daughter dies of the disease, the Health Department investigates. Forbes knows that he is in violation of the registration requirements for typhoid carriers, so he flees with his wife Helen. Dan Mathews learns of Forbes  background and orders an intensive search. Helen learns of the Highway Patrol s involvement and convinces Forbes that he needs to turn himself in and face the grief-stricken (and vengeful) Hank Dooley. Dan and Officer Larrabee hear of the Forbes  plans and arrive at the Dooley farm just as the distraught father is attempting to extract armed revenge for his daughter s death.