11-year-old Gilbert is new to the neighborhood and ready for a new and better life. All he has to do is keep his nasty egg allergy a secret, especially from the girl next door, Line, the captain of the hockey team. But when Gilbert's self-absorbed aunt Doris shows up to baby-sit just before Christmas, Gilbert's new life is threatened. His scheming aunt deliberately serves him egg! Gilbert soon learns that the best defense is a good offense, and he lays a vindictive plan for Christmas Eve…