One, two, three, sun is the story of Victorine ( Anouk Grinberg ) who grew up in the suburbs of Marseille, stifled by her mother ( Myriam Boyer ) and caught between the urge to grow up and that of helping her father alcoholic ( Marcello Mastroianni ) to heal and go home. Victorine becomes an adult somehow and meets her first love, Petit Paul ( Olivier Martinez ) who is killed with a shot by the bastard ( Claude Brasseur ). Later, Victorine meets Maurice Jean-Michel Noirey, her future husband.