When Toru Sagara (Yujiro Ishihara) returns home from a foreign cargo route, he proposes to his beloved girlfriend Akiko (Ruriko Asaoka). She joyously agrees, promising a life together. On the day they were to be joined in matrimony, Akiko suddenly goes missing. Toru waits hours for her to show, but he is only greeted by the darkness of night. Four years later, his fiance turns up at a night club in Yokohama with another man.