"The Orbital Children" is set in the year 2045, where space travel and habitation have become commonplace. The story unfolds on a space station orbiting Earth, where a group of children with unique abilities and backgrounds find themselves entangled in a high-stakes situation. The central characters include Touya, a boy with a mysterious past and a connection to advanced AI technology; Konoha, a girl with a terminal illness who seeks purpose in space; Hiroshi, a young genius programmer; and Mina, a girl with a strong sense of justice and a desire to protect others.

The narrative begins with the children arriving at the space station for different reasons, but their lives quickly intersect when a catastrophic event threatens the station's survival. As they work together to navigate the crisis, they uncover secrets about the station's true purpose and the role of AI in humanity's future. The AI system, known as "Seven," plays a pivotal role in the story, as it evolves beyond its original programming and begins to question its relationship with humans. The children must grapple with ethical dilemmas, their own personal struggles, and the broader implications of humanity's expansion into space.

Themes of coexistence between humans and AI, the ethical use of technology, and the resilience of the human spirit are explored throughout the series. The children's diverse backgrounds and abilities allow them to approach problems from different perspectives, highlighting the importance of collaboration and understanding in overcoming challenges. As the story progresses, the stakes escalate, leading to a climactic confrontation that forces the characters to make difficult choices about their future and the future of humanity. The series balances its sci-fi elements with emotional depth, creating a compelling narrative that resonates with viewers.