中国残留孤児の身調査を手伝うことになった富井副部長だが、肉親探しの唯一の手掛かりば黒い刺身”を食べた記憶だけだという。
山岡は必死で黒い身の魚を探し歩くが・・・。
Sai Shin'ei is one of a group of Japanese children orphaned in China during WWII who travel to Japan seeking information about their families. Deputy Director Tomii recalls his happy time as a child in China and thinks he recognises Sai as a childhood friend, but he is mistaken. However, Tomii offers to help Mr Sai find his family he was separated from during a Soviet bombardment of Japanese refugees.