A little girl and her mother live in a plain suburb. Her mother calls her Nancy, but the girl is not convinced. Her friends are the only ones who understand her, telling her she is a princess called Fortuna and must find her way back to her planet. However, an unspeakable secret shadows their lives.

Filtered through the eyes of three children, a dreamlike vision of ordinary life slowly mutates into a horror fairytale. Based on a true story, the dark imaginative universe of Fortuna uncovers a powerful emotional tension between refuge and reality, and is likely to leave a lasting impression.