Sarah and Cédric, 18, childhood friends, are found between life and death next to a wrecked car. When the investigator in charge of the case discovers that her own daughter was with Cédric and Sarah a few hours before the accident and is hiding part of the truth, she vows to shed full light on that night.

His quest for the truth will shine a spotlight on the secrets of the group of friends, the responsibilities of each, and draw the parents into the murky and secret world of adolescence.