Antoine Vautier is a failed actor. A director hires Christian, Antoine's son, for a film. He immediately becomes a star. Antoine suffers from it. Christian's second film is a disaster and faced with the collapse of his son, Antoine forgets his jealousy.
As its title indicates, La Mort du Cygne (The Dying Swan) is set in the special world of the ballet. Young dance student Janine Charrat idolizes her teacher-role-model Yvette Chauvire, and will do anything to help Chauvire further herself.