Twenty years ago, the Matsukaze disappeared while flying around the world. Sagara Tokichi firmly believed that one of the mechanics, Shirota Matsui, was alive and returned to Tokyo. After accepting the commission, Rikyu Kurido launched an investigation and discovered Matsuda's secret. Sagara said he saw Matsuda emerging from the swamp and behaving strangely. Kurido deduced that Matsuda had committed murder and was afraid of being exposed and did not dare to show up. At the same time, Kurito learned about the situation of the "Matsukaze" and the relationship between Masato Kazama and Sagara. So why has Matsuda been hiding his whereabouts? What is the true whereabouts of the "Matsukaze"? Is Masato Kazama still alive?
