One cloudy Monday, Basia and Janek, siblings with lush imaginations, were arguing in the bathroom about whether it was really necessary to brush their teeth after every meal. Janek stood with toothpaste in one hand and a toothbrush in the other, clearly bored with the daily ritual. Basia, who had just lost her last milk tooth, looked at him perversely. - 'What, are you afraid the toothbrush will suck you in? - she joked. Janek just shrugged his shoulders, turned off the tap and reached for his toothbrush. At that moment, something unusual happened: a strange buzzing sounded and the stream of water in the sparkling bathroom turned into a whirlpool of colourful bubbles. The toothbrush slipped from Janek's hand, began to glow and growing bigger until it became as big as a wardrobe door! - Is this... possible? - exclaimed Basia, as a soft, melodious voice came from inside the toothbrush: - Help! Someone is stealing teeth from the Land of the Mouth! Before they had time to think, they were pulled inside by a sheaf of bubbles. In an instant, they found themselves in an unusual place: underfoot they had toothpaste carpets as soft as cotton wool, and all around them stretched a labyrinth formed of high walls resembling giant teeth. Brush-like creatures flew above their heads, and a glittering palace of dental floss could be seen in the distance. Janek grabbed Basia's hand, and their hearts beat faster than usual. Muffled voices rang out across the maze: - Hurry! If the teeth die forever, we will lose the power of the smile! Basia looked at Janek, trying to summon up courage: - We must find a way to solve this riddle. Suddenly, a mysterious figure emerged from around the corner. In one hand she held a bag full of shiny teeth, in the other a large balloon gum, from which a hat was made. - Who are you? - asked Janek, trying to hide the tremor in his voice. The figure smiled broadly... and then something happened that they would never have expected....