This is the story of Lucia, a restless kid who suffers a domestic accident and looses a tooth. Santiago, her father, an unemployed chef and Pilar, her mother, a successful architect with work to spare, ease her with the illusion that Raton Pérez will stop by her room that night, take her tooth and replace it with a coin. What they don't know is that the alert sign is already being spread...
A little mouse spying the situation warns another mouse who then warns another who warns another who finally warns... Raton Pérez! who lives on a boat anchored at the port along with hundreds of mice who gather the teeth, clean, sculpt and polish them to turn them into shiny round pearls. These are taken through the city sewers to a jewelry store own by Morientes - an old friend of Pérez that trades them paying the teeth's weight in gold coins.
What should have been a routine job for the mythical mouse won't be tonight since the most heartless and ambitious thugs decide to kidnap Pérez and take control of his boat and his fortune.
This would be the end of the story for everyone except for Lucia who - with the help of her cousin Ramiro - disobeying her parents and not measuring the consequences will try to rescue Pérez unleashing a fascinating adventure that will prove that you don't have to be a kid to believe.
| Directed by | Juan Pablo Buscarini |
| Written by | Enrique Cortés |