"To Terra" is a science fiction manga set in a distant future where humanity has abandoned Earth, now referred to as Terra, due to environmental collapse. Society is governed by a highly advanced computer system known as the Superior Domination, which enforces strict eugenics policies to maintain order. Humans are divided into two groups: the genetically engineered Elite, who live in controlled environments, and the Mu, a group of telepathic mutants considered inferior and dangerous. The Mu are exiled to the fringes of society, hunted, and eradicated by the system.

The narrative unfolds through the perspectives of multiple characters, primarily Jomy Marcus Shin and Keith Anyan. Jomy, a young Elite, discovers he is a Mu after exhibiting telepathic abilities. Forced to flee, he joins the Mu resistance and becomes their leader, guiding them in their struggle for survival and acceptance. Keith, a high-ranking Elite, is tasked with eliminating the Mu but begins to question the morality of the system he serves. His internal conflict and eventual realization of the Superior Domination's flaws drive much of the story's tension.

As the Mu seek to return to Terra, their ancestral home, they face relentless opposition from the Elite and the Superior Domination. The story explores themes of identity, oppression, and the ethical implications of genetic engineering. The Mu's journey is fraught with sacrifice, betrayal, and moments of hope as they fight for their right to exist. The narrative culminates in a climactic confrontation between the Mu and the Elite, challenging the very foundations of their society and the future of humanity.

The manga delves into complex relationships, particularly between Jomy and Keith, whose paths intersect in ways that highlight the moral ambiguities of their world. Supporting characters, such as Soldier Blue, a Mu elder, and Physis, a young Elite girl, add depth to the story, representing different facets of the conflict. The interplay between personal struggles and larger societal issues creates a layered and thought-provoking narrative. "To Terra" is a compelling exploration of humanity's capacity for both destruction and redemption, set against the backdrop of a dystopian future.