The story revolves around three young men in different European cities who become entangled in criminal activities, reflecting the post-war disillusionment of their generation. In Paris, Pierre is a rebellious youth involved in petty theft and reckless behavior. His actions spiral out of control when he gets mixed up with a group of delinquent peers, leading to dangerous consequences. In Rome, a seemingly innocent schoolboy named Giovanni faces societal pressures. Struggling to make sense of his place in the world, he resorts to violence, lured by the thrill and a need for validation. Meanwhile, in London, a writer named Gerald finds himself on the wrong side of the law when aspirations for artistic success turn into a desperate bid for recognition through sensational means.

Each storyline critically examines themes of moral decay and the pursuit of identity amid societal shifts. The characters' interactions reflect broader existential questions and disconnection within their communities. As the narratives progress, the protagonists face escalating tension and moral dilemmas that force them to confront their own principles and the repercussions of their actions. The film's interwoven tales cast a somber yet compelling look at the aftermath of war and the relentless struggle for meaning in an unstable world.