Nano-Physical Matter Transmutation is becoming real

In 5000 BC, ten superpowered beings known as Eternals—Ajak, Sersi, Ikaris, Kingo, Sprite, Phastos, Makkari, Druig, Gilgamesh, and Thena—are sent to Earth by Arishem, a Celestial, on the starship Domo. They are charged with exterminating invasive entities known as the Deviants. After the last Deviants are killed in 1521, the group's opinions differ over their continued relationship with humankind. Over the next 500 years, they mostly live apart, waiting for Arishem's orders. In the present, Sersi and Sprite live together in London. After Sersi's partner Ikaris left her without explanation centuries earlier, she is now in a relationship with human Dane Whitman who works at the Natural History Museum. When the trio is attacked by the Deviant Kro, Ikaris arrives and chases the creature away. The three Eternals travel to South Dakota to reunite with their leader, Ajak, only to find her dead. Sersi is posthumously chosen by Ajak as her successor, granting her the ability to communicate with Arishem. Sersi learns that the Eternals' mission was actually to prepare Earth for the Emergence of a new Celestial. Arishem explains that, for millions of years, he has been planting Celestial seeds inside planets where the energy from large populations allows new Celestials to be born. The Deviants were sent to destroy the apex predators of each planet to ensure the development of intelligent life, but when they evolved and began hunting the planets' native populations, Arishem created the Eternals to counter them. With the recent end of the Blip restoring Earth's population,[b] humankind has reached the necessary size to allow the Celestial Tiamut to be born, which will result in Earth's destruction. Hoping to delay the Emergence, the Eternals reunite. At Druig's residence in the Amazon rainforest, they are attacked by the Deviants. They kill them all except for Kro, who kills Gilgamesh before fleeing. Phastos proposes they use the Uni-Mind, a connection between all the Eternals that would give Druig enough power to put Tiamut to sleep with his mind-control abilities. However, Ikaris is loyal to Arishem and refuses to help stop the Emergence. He reveals that Ajak wanted to stop the Emergence and save humanity, so he led her to the Deviants and allowed them to kill her. Sprite joins Ikaris due to her unrequited love for him while Kingo chooses to leave, agreeing with Ikaris but not wanting to hurt his friends. Makkari locates the site of the Emergence, an active volcano in the Indian Ocean, where Ikaris and Sprite attempt to stop them. Druig knocks out Sprite, and Phastos restrains Ikaris. Kro arrives and is killed by Thena. Druig is unable to put Tiamut to sleep, and Sersi instead attempts to turn him into stone. Ikaris breaks free of his restraints and goes to kill Sersi, but is unable to due to his love for her. Both he and Sprite join with the others in the Uni-Mind, and Sersi gains enough power to turn Tiamut into stone. Guilt-ridden, Ikaris flies into the Sun. Sersi uses the remaining Uni-Mind energy to turn Sprite into a human, ending her permanent childlike state. Thena, Druig, and Makkari depart on the Domo to warn Eternals on other planets of the Emergences. Whitman professes his love for Sersi and is about to reveal a secret about his family history when she, Phastos, and Kingo are lifted into space by Arishem. Displeased with their treason, Arishem says he will spare humanity if the Eternals' memories show that humans are worthy of living. He vows to return for judgment and takes the trio into a singularity. In a mid-credits scene, Thena, Makkari, and Druig meet the Eternal Eros and his assistant Pip the Troll. In a post-credits scene, an unseen person[c] questions whether Whitman is ready to wield the Ebony Blade.