Smilingüido and Piriá go out into the woods to do research for Mestre Formisã's class. What they do not know is the great discovery they would make: an invasion of the Sauvitas Ants in a large area of the forest. The two friends need to run to tell the queen what is happening, leaving the Formigamigas before an impasse: Did the Sauvites break the agreement? What if the Sauvites do not back down?