"When Marnie Was There" is a Japanese animated film produced by Studio Ghibli, based on the novel by Joan G. Robinson. The story follows a young girl named Anna Sasaki, who is sent to the countryside for her health. There, she discovers a mysterious mansion and meets a girl named Marnie, who becomes her close friend. As Anna and Marnie's friendship deepens, Anna learns about Marnie's past and the secrets surrounding the mansion. The film explores themes of friendship, loneliness, and self-discovery, showcasing beautiful animation and a touching narrative that resonates with audiences of all ages.