In one of her trips in search of Viravento, Vivi arrives in the Iguaçu Falls. While there, Vivi, Backpack and Flashy get to know Arquito, a student that is about to go to The Great School of the Rainbow, to become even bigger and brighter. Scared, he's going to rely on Vivi and her friends to create courage and face the first day in the new school.
