Before long, Katherine receives word that her mother was freed, sent to Hong Kong and will be flown home shortly and that her father, while still a prisoner, is back working as a medical missionary.
Katherine is then put into the Tennis Six, where she play brilliantly in her own match, and then fills in as an emergency substitute in a second match, winning that one as well. Blossom Willoughby, who should have been the substitute, had been locked in an art studio and, unable to get out by any other means, smashed a window using a stool, a bust (named Clytie) and her shoe.
Her Aunt Luce turns up announcing that she forgot to enrol Katherine at all - actually just failed to mail the final letter. The book closes with Katherine's mother and father safe and sound and Katherine feeling very much a part of the school enjoying a water pageant.