Thousands of years ago, the Eternals arrived on Earth, tasked by the god-like Celestial overlord Arishem to watch over humankind and observe their civilization develop, clearing away any threats from their on-going enemies called Deviants. Century passes by as the guardianship of Eternals, which is maintained by Ajak (Selma Hayek) and consisting of Thena (Angelia Jolie), Druig (Barry Keogahn), Makkari (Lauren Ridloff), Gilgamesh (Don Lee), Sprite (Lia McHugh), Kingo (Kumail Nanjiani), Phastos (Brian Tyree Henry), Sersi (Gemma Chan), and Ikaris (Richard Madden). After the group wipe of the last remnants of the Deviants on Earth, most of the Eternals go their separates ways, sneaking into the ways of mankind and living out their lives amongst humans and the modern age. Living in London, Sersi finds peace, enjoying a warm relationship with Dane (Kit Harrington), only to find her tranquil peace is destroyed by sudden appearance of a Deviant. Reuniting with Ikaris, Sersi starts to realize that something major is happening, with the pair setting out to reunite the Eternals once again, who are forced work through their internal issues (of the peers and inner demons) as Earth faces its greatest challenge from an unknown enemy.