In 3028, a malevolent energy-based species called the Drej declares war on humanity before Professor Sam Tucker, a lead researcher of the experimental “Project Titan”, gives his 5-year-old son, Cale, a ring and sends him on one of the evacuation ships with his alien friend, Tek.

Meanwhile, Sam and his team launches the Titan spacecraft into hyperspace and the Drej mothership, using a massive laser aimed at the North Pole, destroys Earth, which explodes into a massive cloud of debris that destroys the Moon as well, ending any chances of humanity finding a place to settle in the universe. Most of the evacuation ships escape, though some are destroyed by the Drej and Earth’s debris…