Titan A.E.
In 3028 A.D., Earth is attacked by pure energy aliens called the Drej. Its spacecraft uses the energy beam to destroy Earth, while hundreds of space vehicles leave the planet with the last of mankind on them. The secret Titan ship with Professor Sam Tucker aboard leaves at the same time, but not with the other vessels. One of the others escape the planet, including Sam's son Cale, who keeps a ring from his father.