A girl relies on her imagination whilst living in society. For example, the forecast is for light showers, but she thinks the weather is clear. When the girl feels happy, the sky's colour is pink in her eyes. In addition, some people say spiteful words to her, while the girl hears something lovely. 

The 'sickness' has a powerful influence on her daily life. For example, she thinks that she lives in Europe (but actually, she live in China). There are different driving directions in Europe and China. When the girl crosses the road, she first looks in the right direction, but she needs to look left first in China. It is deadly – she almost loses her life in a traffic accident.