A girl leaves everything she knows because someone might love her back. That's the entire show. Nadja travels across turn-of-the-century Europe on pure faith that her mother exists, and every episode asks the same question: what do you owe to someone you've never met? The orphanage she leaves behind doesn't disappear from the story. Neither do the people she meets. This is a show about collecting a life, not abandoning one for a better version. By the end, you understand that finding her mother was never the point.

Nadja grows up in an orphanage near London, where she was left as a baby. She is a bright, cheerful girl who has always assumed her parents are dead. Shortly before she turns thirteen, she learns that her mother may still be alive. This revelation overturns what she believed about her past and sends her on a journey across Europe in the early twentieth century to find her. The series is an adventure drama with a thread of romance, driven by the question of whether Nadja will finally find her mother.