Mary Ellen awakes to find that Nurse Nora, the district nurse who looks after all the mountain people, has been called into service and she has asked Mary Ellen to take over her rounds for her, while waiting for a replacement to come. Meanwhile Olivia is very busy herself, filling in as a school teacher. John, however, is being queried by the army intelligence, who can find no record of him ever having graduated from high school. If John wants to continue doing business with the army, he needs to find his diploma to prove that he did graduate.