It's a long time since Yoona and Kris her brother spilt up. It's because they parents break up. Yoona live in a village in Australia with her mother and Kris live in Korea with his father. But, now... Their father want to be one again with their mom. So, Yoona's father come to Yoona's house and ask her mother to go with him. So, Yoona go back to Korea... But, it's not as great as it should be...