The new school year begins with troubles for Fili and Dani: first they quarrel with twin sisters Aska and Anya, then someone steals their kitten. And to top it all off, it turns out that both the children and their parents... are about to be evicted from their home! Adults do not even suspect what a cunning and dangerous adventurer is building secret intrigues against them. And then Filya and his friends decide to measure their strength with the influential swindler themselves. To defeat him, the guys have to learn the most unexpected things: catch keys rather than fish with a fishing rod, chase telephone terrorists and even... draw portraits that can swim!..