Every day, Loro enviously watches caravans of armored Brachiosaurs leave his town and cross the bridge into the dangerous jungles of the Rainy Basin. Someday, he promises himself, he will go there too. Then a deadly storm sweeps over Dinotopia, and the Brachiosaurs go to help the towns that were hit the hardest. So when a hot-air balloon crashes into the jungle, Loro and his friends know they are the only ones who can help. Loro's dream will finally come true, but can he survive the perils of the Rainy Basin?