A group of disaffected adolescents attempts to impose their rigid, nihilistic philosophy upon the adult world, leading to a collision between youthful idealism and societal norms.

The protagonist, Noboru, and his peers view the adult world as a realm of weakness and sentimentality, choosing instead to cultivate a cold, detached objectivity. Their objective is to purge the world of what they perceive as hypocrisy, a goal that brings them into direct conflict with Noboru's mother and her new lover, a sailor. The narrative framework utilizes a third-person perspective that shifts between the internal lives of the boys and the adults, highlighting the stark contrast between their worldviews. The story unfolds within the physical constraints of a post-war Japanese port city, where the sea serves as both a symbol of freedom and a source of inevitable betrayal.

Readers and critics frequently discuss the stark contrast between the boys' cold, intellectualized violence and the emotional vulnerability of the adult characters. Discussion often centers on the author's ability to maintain a detached, almost surgical tone while exploring themes of betrayal and the loss of innocence. Many highlight the effectiveness of the sea as a recurring motif that anchors the narrative's philosophical inquiries into the nature of existence. The pacing is noted for its deliberate, methodical progression, which builds toward a conclusion that challenges the reader's moral perspective. This work is often cited for its intense psychological depth and its unflinching look at the darker impulses of the human psyche.