Sixty-five million years ago…
… an artificial alien intelligence has come to strip-mine the prehistoric Earth – but when their robotic automations kill a mother T. rex, they start a war.
One of her hatchlings has survived, traveling with an adoptive raptor pack – and as the orphaned tyrannosaur grows, they wage a guerrilla war against an invading army of war-bots and giant cloned-cyborgs.
Primeval monsters battle alien machines as more prehistoric beasts join the fight, striking back against a common enemy.
But the invaders also wield Doomsday weapons.
One of them is the deadliest substance in the universe – a mutagen that can wipe out entire species.
The other is a giant asteroid sent to destroy the world.
