Alice is a thirtysomething full of complexes. She finds herself ugly and fat and her lack of self-confidence prevents her from undertaking anything, professionally or emotionally. Following a fall on her head, she wakes up convinced that she has become, as if by magic, a sublime girl. Armed with this brand new self-confidence, nothing can resist her: she lands the job of her dreams and finds love in the person of Benjamin. But what will happen if this illusion disappears? Will Alice be able to keep this self-esteem that has been so lacking to her until now?