After a family tragedy, Pierre and his sister Clémence are forced to leave their home and move into a small, dilapidated apartment together. Devastated, Pierre sinks into a deep depression, and his anxieties—first vague and elusive—begin to consume his daily life. His crises grow uncontrollable, until the unimaginable occurs: a devil starts visiting him at night.
As Pierre is drawn further into these visions, his grip on reality begins to dissolve. Opposite him, Clémence finds herself both sister and guardian. Overwhelmed by her job in a restaurant and her role as protector, she fights to pull Pierre back to the surface. But how can we help those we love turn away from their demons?