A young man, a researcher in ancient languages, begins to receive strange radio messages in a language only he knows. The messages ask him for very bizarre missions. Eventually, he understands that he's just a pawn in an intergalactic game, and that the fate of Earth depends on him.

Philippe Volter
as Stéphane

Christophe Bourseiller
as Fabien

Nathalie Roussel
as Brigitte

Roland Giraud
as L'expert

Maaike Jansen
as La psychanalyste

Marcel Maréchal
as L'homme du parking

Arlette Thomas
as La concierge

Michel Lengliney
as Le médecin

Denise Guillard
as L'infirmière

Daniel Schropfer
as Le chauffeur du taxi