In a moment your life could forever be changed. That's what happens to all the drivers and passengers caught up in the six car pileup. Amid the wreckage are the dead and wounded. In the aftermath one of the victim's father sues the police blaming them forthe crash. It falls to Douglas Henshall and Kate Ashfield as a pair of dedicated detectives to investigate the incident. The more clues they uncover the closer they come to the truth that there was indeed something sinister at the root of this collision.Now what to do with that information?