병원에 7개월째 입원 중인 효연에게 어느 날, 동쪽 마녀 기숙학교 원장 '오수지'가 찾아온다. 원장은 효연에게 대뜸 자신의 후계자로 점찍었다며 함께 마법 세계에 갈 것을 요구하지만 효연은 홀로 남을 아빠가 걱정되는데...-Hyo-yeon has been hospitalized for seven months, and one day, the headmistress of the East Witch Boarding School, Ms. Oh Soo-ji, visits her. He tells her that he has predicted her successor and asks her to go with him to the magical world, but she worries about her father, who will be alone...