This classic evergreen farce is set in Oxford during Commemoration week. The imminent visit of Charles Wykeham's aunt from Brazil, Donna Lucia, provides an excuse for Charles and Jack to invite their young ladies to meet her. When a telegram arrives postponing Donna Lucia's visit, they persuade their amiable friend Babbs (since they must have a chaperon) to impersonate the aunt. Here the fun begins, Babbs, thoroughly enjoys being kissed and caressed by the girls and receiving their confidences, but finds his ingenuity severely taxed when brought face to face with the real Donna Lucia. Moreover, Donna Lucia amuses herself by concealing her identity where declaring that she knew Donna Lucia's husband most intimately. All ends, of course, happily!