"Edens Zero" is a science fiction anime series set in a vast universe where humans, aliens, and sentient robots coexist. The story centers on Shiki Granbell, a young boy raised by robots on the abandoned theme park planet Granbell. Shiki possesses the ability to manipulate gravity, a power known as Ether Gear, inherited from his adoptive grandfather, Ziggy, a legendary figure known as the Demon King. When Rebecca Bluegarden, a B-Cuber (a type of social media influencer), and her robotic cat companion, Happy, visit Granbell, Shiki decides to leave his home and explore the cosmos with them.

The trio embarks on a journey aboard the starship Edens Zero, seeking the mythical goddess Mother, who is said to grant any wish to those who find her. Along the way, they encounter various allies and adversaries, including Homura Kōgetsu, a skilled swordswoman with her own Ether Gear, and Weisz Steiner, a tech-savvy thief with a mysterious past. The crew faces challenges such as interstellar conflicts, powerful enemies, and the complexities of their own personal histories.

The narrative explores themes of friendship, identity, and the coexistence of humans and machines. Shiki’s journey is driven by his desire to connect with others and uncover the truth about Ziggy’s disappearance. Rebecca’s goal is to create compelling content for her B-Cube channel while discovering the wonders of the universe. As the crew delves deeper into their quest, they uncover secrets about the cosmos, including the existence of the Chronophage, a time-eating entity that erases entire planets, and the dark history of the Demon King.

The series balances action, humor, and emotional moments, with a focus on character development and world-building. The universe of "Edens Zero" is richly detailed, featuring diverse planets, advanced technology, and intricate lore. The interplay between the main characters and their evolving relationships forms the core of the story, as they navigate the challenges of their journey and confront their own fears and aspirations.