Ji So (played by Lee Zhen) is an innocent ten-year-old girl who has a lively and cute younger brother Ji Suk (played by Hong Eun Taek). Under the careful care of her father and mother Zheng Xian (played by Kang Hye Jung), the two siblings Growing happily and vigorously. However, one day, the happy days suddenly came to an end, and my father passed away...