She is used to turning left, while he is used to turning right. And they have never met. Like most people in the city, they may never know each other, though they live so near. However, life is full of coincidences, two parallel lines may joint one day. When that day comes, winter is gloomy no more, and their lonely hearts get warmed. Whereas, life is also full of accidents, like the kite in your hands can be disconnected suddenly. The city is like a puzzle, they cannot hear the calling or find the direction. Though they are so near, it seems to be so far. She is still used to turning left, and he is still used to turning right. However, this time their step finds the direction of love and spring finally comes.