The saga of the Eternals, a race of immortal beings who lived on Earth and shaped its history and civilizations.
Following the events of , an unexpected tragedy forces the Eternals, ancient aliens who have been living on Earth in secret for thousands of years, out of the shadows to reunite against mankinds most ancient enemy, the Deviants.
In 5,000 BC in Babylon, earthlings are attacked by the predator Deviants. The humanoid race of powerful Eternals are awaken in their spaceship by their creator Arishem and unleashed to destroy the Deviants with their abilities. However, they are not authorized to return to their ship and have to stay living on Earth along the centuries. On the present days, in London, the eternal Sersi is walking near the river with her earthling boyfriend Dane Whitman and her friend and also eternal Sprite when they are attacked by a Deviant. Soon the Eternals join themselves to fight the predator race that is more powerful now and they learn dreadful secrets about Arishem and their origins while fighting the predators.