In 1992, a heavy rain caused a power outage in Hong Kong. The stargazing enthusiast Zi Yue and the rebellious Sunrise met at the beach and fell in love. Soon, Sunrise was sent to boarding school by his father and had to immigrate to a foreign country a few months later. The two were as difficult to see each other as Sun and Moon, and Zi Yue's mother kept trying to stop them. But they eventually overcame all difficulties and started a long-distance relationship that seemed to be separated by two places. At the same time, they had to face challenges from their family, teachers, classmates, etc.