In an age of severe water shortage, TV programs are teaching various water-saving methods and encouraging the drinking of watermelon juice in place of water. However, everyone has his own solutions when it comes to finding water. Shiang-Chyi picks up empty bottles and fills them with water stolen from public toilets while Hsiao-Kang, now a porn actor, climbs to the rooftop in the middle of the night to bath with what little water he can find in the water storage tanks. Survival is hard but loneliness is even harder to bear. Each of us is like a cloud in the silent sky - always floating alone and never touching each other. One day, Shiang-Chyi finds a watermelon and later meets Hsiao-Kang in the park. She remembers buying a watch from him before. She has not seen him since then and has no idea what he is now doing at her building. They fall in love. When a cloud touches another, what shape will they form?