An English squire brings a fifteen-year-old Irish peasant girl into his household to be raised as a daughter, triggering domestic embarrassment and strained relations. The newcomer confronts cultural differences and snobbery while she settles into family life and attends the Red Gables school, where sisters and classmates react variously. Episodes include country adventures, a disappearance and rescue, school rivalries, a hockey-field confrontation, accusations, and inquiries that demand restitution. Rivalry and treachery lead to a dramatic discovery and flight before a final competition tests loyalties. The story follows her resilience, friendships, and the slow easing of class prejudice.