Martin attends an interview for the post of general practitioner (GP). Having unwittingly offended local teacher Louisa Glasson, he spontaneously diagnoses her glaucoma. Although pleased to renew his acquaintance with his Auntie Joan with whom he spent holidays as a boy, he is less than enamoured of the other locals he encounters and the state of his predecessor's surgery. He also inadvertently uncovers an affair between a teenager and the wife of the Lieutenant Colonel, leading to threats of a divorce, a reconciliation and then a punch on his nose. Disillusioned, Martin decides he has made a mistake and plans to return to London.