In a post-war Paris, a mysterious dreamer named François finds himself trapped between reality and his nocturnal fantasies. After a series of enigmatic encounters, he becomes a man who can literally cross the doors of the night, a space where the deepest desires and obsessions manifest. In his nocturnal journey, François encounters a series of eccentric characters that reflect the anguish and longing of a city in reconstruction.
Among them is a young woman named Léone who yearns to escape her monotonous life, and a cabaret artist, Jean, whose existence has become a shadow of what it used to be. François's emotional crisis intensifies when he is forced to confront his past, discovering that love and betrayal are inseparable in his dreams. The dreamy atmosphere is enhanced by the urban landscapes of Paris, which intertwine the tangible with the ethereal.
As the nights swirl into a whirlwind of stunning images, François begins to question his own identity and choices. In the end, he must decide whether to abandon the labyrinth of his daydreams or accept that the only way to live is to embrace both the light and darkness of his life. The film, with its rich visual palette and complex symbolism, becomes an emotional journey that resonates with the echoes of a world seeking to be reborn.