陸一心は優秀な青年に育ちました。しかし、１９６６年に文化大革命が始まり、日本のスパイとして無実の罪を着せられます。そして労働改造所に送られダム工事など、過酷な労働が続きます。そうした生活の中での慰めは、親友の袁（えん）力本や大学時代の恋人・丹青との思い出でした。１９７０年（昭和４５）８月、日本にいる実父の松本耕次は、故郷長野の満州開拓団の慰霊祭に参加し、中国残留日本人の肉親捜しの話を聞きました。
Riku Isshin grew up to be a brilliant young man. However, when the Cultural Revolution began in 1966, he was falsely accused of being a Japanese spy. He was sent to a labor reformatory, where he was forced to work hard at dam construction and other hard labor. For solace in such a life, he had memories of his best friend Yuan Rikibon and his college sweetheart Tan Qing, and in August 1970, his biological father Koji Matsumoto, now in Japan, attended a memorial service for the Manchurian Settler Communities in his hometown of Nagano and heard stories about the search for his relatives who had remained in Japan after the Chinese occupation.
