Young Mary Katherine returns to the house of her estranged father Professor Bomba, who is a widower scientist obsessed to find tiny creatures that he believes that would live in the forest. MK does not accept the lack of attention of her father with her and decides to leave him again. However the creatures do exist and protect the forest against the evil Boggans and their leader Mandrake that wish to destroy the forest. Miraculously, Maria finds herself shrunken in size and meets the little warriors. Now the salvation of the magical forest, as well as the real human world, depends on her…