On a cold winter evening, a young boy launches a paper airplane into the sky. The paper airplane travels through the dark alley and into the hands of a middle-aged man, and then to a cleaner. Eventually, they meet up at the location where the paper airplane had landed. They burn the airplane to light up a fire. Can hope be connected and shared in the end? 　　源自：https://siff.kr/en/... (展開全部)