Psycho in Provence is a thriller film, which tells a complicated horror story. The hero of the story is trapped in a claustrophobic castle, surrounded by a mysterious atmosphere. He constantly encounters all kinds of strange events. The protagonist in the film is a mysterious little girl, and her appearance is closely related to the whole story.

Susanna, a little girl who has been appearing in the film, is a mysterious little girl who appears in the dream and reality of the protagonist, adding more mystery and horror to the whole story.

In the film, the missing child has a certain relationship with Susanna, but the specific details are not clear in the film. Some viewers think that the missing child may be Suzanne's past life, while others think that Suzanne may be the soul of the missing child. However, these views are only guesses of the audience and have not been officially confirmed.