Summary: La Boum stars Sophie Marceau as a 13-year-old French girl, coping with domestic problems. Her parents, played by Claude Brasseur and Brigitte Fossey, are on the verge of a marital breakup. This is coupled by a traumatic move to Paris, and Marceau's problems in adjusting to her new surroundings and schoolmates. Though nothing new, La Boum is disarmingly diverting, a real audience pleaser (as proven by its huge international box-office take).
At age 13, Vic, a teen-age girl, finds her life in a state of upheaval when her parents move to a new home. Making a place for herself in her new surroundings, she discovers new interests: clothes, boys, mopeds and the "boums", the big week-end parties given by her new friends. In the meanwhile, Vic's parents are going through a cataclysmic stage in their own, when, after 15 years of marriage, the are suddenly embroiled in mid-life crises, professional and personal jealousies and, ultimately, adultery.