In winter in the city, the north is desolate and pale with heavy snowfall, while the south is warm and blooming like spring all year round. One has a sincere and beautiful innocent heart in the big city shrouded by philistines and money in the north; the other is a cold, aloof and lonely heart living under the flowers and hope in the south. One has heard all the joys and sorrows of the world and all kinds of life, and the other has closed his heart after experiencing the pain of separation and deception. What kind of stories can happen to them? One is water and the other is mountain; one is ice and one is fire; one is hot and the other is cold. Is water and fire incompatible, or is water and fire compatible?