"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.