The fate of Carlos and Sarah's city is in jeopardy. The evil Mr. Underton is on a mission to control the City's Power. If he succeeds the City will be plunged into eternal winter. It's up to Carlos and Sarah to keep the City safe, despite the secrets of Sarah's history that are entwined with the Power. What ensues is a race against darkness. A race against the lies of the past. And most of all, a race against time.