Deep in the unknown Amazon rain forest, there is a lost subterranean city. The place was built by Vikings who crossed the Atlantic Ocean and ventured up the Amazon River, that shelters a mysterious treasure. In order to find the secret location, Bárbara (Xuxa Meneghel) and the children Riacho and Manhã will have to face many challenges. Vicious snakes and dangerous pendulum blades are only the beginning of our heroes' adventures in "Xuxa and The Treasure from the Lost City".