This is a playful movie, which is a mixed blessing. Lucía (Cecilia Roth) is presented as an unreliable narrator who embellishes her story as she tells it, which we see as her hair color and apartment decor changes. This keeps the audience guessing what's real and what's a product of her imagination as they observe some of the film's more fanciful developments. With the help of good performances by Roth and others, well-staged shots, and clever art direction, this is a likably breezy film. But it's also a bit too cutesy, and the light tone doesn't mesh with the more serious elements of the screenplay, which addresses political corruption in Mexico. Also, the narrative sometimes gets lost amidst the various plot twists and turns, and it doesn't really add up to a compelling thriller. The film also devotes a lot of time to Lucía's friendship with Félix (Carlos Alvarez-Novoa) and Adrian (Kuno Becker). Both are engaging, but they seem more like movie conceits than fleshed-out characters and their relationship with Lucía is never completely believable. It's possible this is deliberate (in keeping with the idea that Lucía is an unreliable narrator), but it also helps make the film seem more insubstantial. Overall, this is a reasonably entertaining movie, but it doesn't add up to much at the end.