Akiko divorces her husband Fujikawa due to his infidelity, and when she returns to her parents' home, she finds that her family's toy factory is in decline, and she has to work hard to rebuild it. Thanks to the mediation of Niimura, who is a close friend of her brother Shinichi and has feelings for Akiko, they are able to secure a sales contract with a foreign trading company for the toy that Shinichi invented. However, Fujikawa, who has a grudge against Akiko, begins to interfere by making cheap imitations...