Dans ton sommeil (2010)

A mother mourning the death of her teenage son encounters a terrified adolescent being persued by a relentless psychopath, and gets caught up in a ... Show synopsis A mother mourning the death of her teenage son encounters a terrified adolescent being persued by a relentless psychopath, and gets caught up in a bloody battle for survival in this tense French thriller. It's been a year since Sarah lost her son, and she still thinks about him every day. Then, one night, while driving along a darkened road, Sarah witnesses a young boy dash out of the woods and directly into her path. Despite slamming her breaks and doing her best to avoid him, Sarah hits the boy and races to see if he is injured. His name is Arthur, and though he seems to have avoided any major injuries from the accident, he is deeply shaken after stumbling across a homicidal burglar and being pursued through the moonlit forest. And now the killer is after Sarah, too. With no place to run and no one to call for help, Sarah realizes that their only hope for survival is to fight back with everything they've got, and beat the maniac at his own game. ~ Jason Buchanan, Rovi Hide synopsis