A solitary, seventeen-year-old witch is interrupted while foraging for herbs in the endless snow of a magical land. Following ethereal whispers, she discovers four bewildered siblings who have mysteriously arrived. Recognizing the children as figures of prophecy, and sensing the immediate threat from the tyrannical White Witch, Jadis, the young witch must now use her burgeoning magic to guide and protect them in a perilous quest to overthrow Jadis and restore the land's rightful season.