In a dystopian future, secret agent Lemmy Caution travels to a city controlled by a central supercomputer called Alpha 60. Disguised as a journalist named Ivan Johnson, his mission is to find the missing agent Henry Dickson and dismantle the oppressive regime. As he navigates through the city, Lemmy becomes acquainted with Natacha von Braun, the daughter of Alphaville's architect, Professor von Braun. Natacha assists him while struggling with emotions that are suppressed by the computer's strict logical control over everyone in the city.

Lemmy discovers that the citizens are programmed to live entirely by logic, devoid of feelings and individuality, with any display of emotion being met with severe punishment. The city is trapped in a cycle of surveillance and obedience, maintaining control through fear and manipulation. As Lemmy and Natacha grow closer, he realizes that his mission's success depends on awakening her emotions and defying the computer's authority. Tensions rise as Lemmy inches closer to confronting Alpha 60 while nurturing the seeds of rebellion against its totalitarian rule.