In a near-future Brazil, young Uno has an unusual connection with cars, a bond stemming from a childhood accident where a vehicle mysteriously saved his life. Years later, Uno's father runs a struggling taxi company facing pressure due to impending legislation that aims to phase out old vehicles, including their cherished King Car. Uno dreams of escape and sees the family business as a relic, only to later discover that the very cars his father wants to scrap have minds of their own. His shocking interaction with the cars propels him into collaboration with his eccentric uncle, Zé Macaco, who harbors radical plans to transform the old taxis into sentient machines. They develop a prototype vehicle possessing a sophisticated consciousness, merging technology and biology in a strange new alliance.

As Uno and Zé work to revolutionize transportation, their ambitions grow alongside the risks. They dream of freedom and power through this unique breakthrough, setting their eyes on challenging the corporate greed threatening their lives. However, this advancement doesn’t come without consequences, as the ambitions and dreams of man and machine collide, challenging ethical boundaries and raising existential questions about control and rebellion. Tensions intensify when unexpected allies and adversaries emerge, as Uno grapples with the profound implications of what it truly means to give life to metal and integrate it into human society. The journey tests Uno as he comes to terms with destiny and agency in a world driven by mechanization.