Diane Di Biaggio, brilliant head of a wedding planning agency and engaged to Alban, finds her past brought back to life when Kevin, a former lover, threatens to reveal an inconvenient truth. Ready to do anything to protect her reputation, she discreetly plans his death, which turns into a road accident.

Jean-Pierre, founder of a historical reconstruction association, is about to break ground on his 17th-century ecomuseum. But André, the treasurer, discovers that he has embezzled money to achieve his goals. Jean-Pierre devises a way of eliminating him during a show rehearsal...