Borderline, a film version of the novels Borderline and La Brèche, tells the story of Kiki at various stages of her life. With her mother institutionalized, she is raised by her grandmother, where left to her own devices, she takes refuge in school. Her life before 30 is a far cry from fairy-tale. Sex and alcohol are her only outlets and her daily reality. She goes through men one after another. But at 30, Kiki faces the hardest challenge of all: learning to love herself.