"The Wandering Earth" is based on a novella by Liu Cixin, titled "The Wandering Earth." The story unfolds in a future where the Sun is about to expand into a red giant, threatening to engulf the Earth. In a last-ditch effort to save their home planet, humanity embarks on an ambitious project to move the Earth out of its orbit around the Sun and into a new orbit around a nearby star. This colossal undertaking involves generations of space travel and numerous challenges.