A lone Kree survivor, Noh-Varr, arrives on Earth seeking refuge but finds only imprisonment and torture. Driven by the loss of his friends and his own suffering, he becomes a formidable and angry force, capable of challenging the entire planet in his pursuit of love, justice, and the freedom to pilot his spaceship. He must contend with the mysterious Doctor Midas and the Exterminatrix, whose intentions toward him remain unknown, while grappling with whether he will become Earth's savior or its greatest threat.

The collected issues of Marvel Boy by Grant Morrison and J.G. Jones present a unique take on the superhero archetype, focusing on an alien's disillusionment with Earth and his subsequent rage. The narrative explores themes of justice and freedom through the eyes of a character who has experienced significant trauma. Critics and readers often note the distinctive visual style brought by J.G. Jones, which complements Morrison's complex storytelling. The series is recognized for its bold characterization of Noh-Varr, pushing the boundaries of traditional superhero narratives.