Secrets emerge and entire cases unravel inside a police interview room in Paris, where suspects and investigators face off in an intricate dance.

During the summer, Jules, 10 years old, is welcomed by a young couple in the countryside, because his mother had an accident. How to feel at home in a village where its inhabitants are shaken by deep antagonisms. How not to fear what's behind « Les Hautes Herbes », the tall grass?

Secrets emerge and entire cases unravel inside a police interview room in Paris, where suspects and investigators face off in an intricate dance.