Winter has been rough for Belle Song and her family. Food is running low, and her mother is expecting a new baby. To restock food and medical supplies, Belle's father decides to take everyone to Tharsis City, the capital of Mars. Belle can't wait to see the amazing wonders and marvels that Tharsis City has to offer. But unforeseen dangers lurk in the city streets. Will Belle and her Nabian friend, Ta'al, be able to overcome the troubles they face...