The Hairy Tooth Fairy is Spanish movie. Lucia, an active little girl, looses a tooth. Her father and mother tell her that on that very same night, the Hairy Tooth Fairy (a mouse named Perez) will come to collect her tooth and leave money in its place. The Hairy Tooth transforms all the teeth he collects into shiny round pearls where they are then taken to the jewelers and exchanged for gold. When the Hairy Tooth Fairy visits Lucia to collect the tooth, he is kidnapped by a bunch of scoundrels. Hearing news of this, Lucia, with the help of her cousin Ramiro, set out to rescue Perez, thus beginning a fascinating adventure.