Titan A.E Storyline for people who didn't see it.
In the year 3028, the Drej, an alien race have pwned Earth. The main character, Cale (Matt Damon) is given a special ring by his father that contains a map to salvation to the human race, which he discovers 15 years later by a guy who cliamed to know his father. Then Cale meets a girl named Akena (Drew Barrymore) and then go out to find the human races salvation with the map.
In the end, they find another homeworld and Cale calls it Bob, worst joke ever.