All shoes come in twos, but one red shoe becomes separated from its pair. This shoe dearly misses the other shoe and feels so lonely and afraid. When the red shoe meets a greedy, solitary mouse, who has grown used to living alone and has never experienced loneliness, the shoe has an idea Can this mouse help the red shoe find his friend? Along the way, the usually independent mouse comes to understand the feeling that is loneliness.
In "All shoes come in twos"Sulan Tang tactfully tells of what fear, loneliness, anxiety and gratefulness are like by telling a story of a mouse who sees a lost red shoe at the edge of the forest. They become friends, the mouse invites the red shoe home. The next day the mouse assists the red shoe to return home. On their way, they come across a cat, a reality that the mouse has been dreading. Fortunately, a young girl who owns the cat and the red shoes comes along. In the end the red shoe finds the other red shoe and is home. The the mouse returns home and gets lonely along the way. The mouse encounters loneliness - "The emptiness in his heart was, indeed, different from being hungry".