The director of the celebrated black comedy Tatie
Danielle, +tienne Chatiliez returns to the realm
of dark humor with Tanguy. When their eponymous
son is born, Paul and Edith Guetz (Andre Dussolier
and Sabine Azema) are so besotted with the new
arrival that they make him the fateful promise he
can live with them forever. Twenty-eight years
later, with Tanguy still under their roof and
showing no intention of relocating, they begin to
regret their promise. Although she is proud of her
son, who is both excessively smart and handsome,
Edith is soon driven to distraction, and makes
plans to bundle Tanguy off to Asia. When this
doesn't pan out, Edith convinces Paul that they
must resort to more serious measures.