"Hazure Skill" centers on a young man named Lyle, who is born into a prestigious noble family known for their exceptional combat skills. Despite his lineage, Lyle is considered a failure, as he lacks the innate talent expected of his family. Labeled as having a "hazure skill" or "useless skill," he is ostracized and eventually exiled from his family. His skill, however, is not entirely without merit—it allows him to absorb and utilize the abilities of others, though this potential remains unrecognized by those around him.

After being cast out, Lyle embarks on a journey to prove his worth and uncover the true potential of his seemingly worthless ability. Along the way, he encounters various individuals, including adventurers, mercenaries, and other outcasts, forming alliances and facing numerous challenges. His journey is marked by battles, strategic encounters, and the gradual realization of his skill's true power. As he grows stronger, Lyle begins to challenge the societal norms that once dismissed him, carving out his own path in a world that values strength and lineage above all else.

The narrative explores themes of perseverance, self-discovery, and the redefinition of worth in a rigidly hierarchical society. Lyle's interactions with other characters, including those who share his struggles and those who oppose him, drive the story forward. The manga balances action-packed sequences with moments of introspection, as Lyle grapples with his identity and the expectations placed upon him. Through his journey, the series delves into the complexities of power, talent, and the societal structures that define success and failure.