David is driving leisurely through the city centre. While at the wheel he cannot resist the urge to read an incoming message. These few moments of inattention will prove irreversible. He won't notice Julie, the young girl who is crossing the street in front of him returning home from high school. She will be killed on impact.

The first part of the film is shot at actual speed, but when the shock happens, it switches to extreme slow motion. Friends and relatives of road crash victims appear. They are at the heart of the accident. They are seen floating, almost unreal, like flying over the tragedy scene in the same dynamic as the drivers themselves. They are impacted by the shockwave, although they were not physically present in the car. A voice over, along with the camera which shows each of them, explains their connection to the victim.