At the end of Miodowa Street stood a colourful little house where Leo lived with his parents and his toothbrush named Flash. Every evening Leo brushed his teeth together with Flash until they shone like pearls. Opposite lived his friend Susie, who had a toothbrush named Frotka. One morning Leo noticed that his dad's teeth were strangely sticky, even though he had brushed them thoroughly in the evening. The next day, the same thing happened to Susie! "Does anyone eat sweets at night?" - exclaimed Susie frightened. The two decided to organise a night watch. Armed with toothbrushes and magnifying glasses, they hid under the bathroom table, listening for every rustle. Suddenly, there was a quiet, mysterious giggle, and a shadow emerged from the darkness.... Was this the culprit of the sticky teeth? Who is the mysterious visitor to Brushkoland? Leo and Susie froze motionless, listening for footsteps....