Minority Report meets Groundhog Day as soldier Jake Gyllenhaal finds his mind in another man's body on a train that will be blown up in exactly eight minutes, killing everyone on board. After the event, he is jolted back to a strange chamber where a military handler (Vera Farmiga) informs him the scenario will be repeated until he finds the bomber, thus averting an even greater atrocity. Is it a simulation? A dream? A crazy experiment? Fellow passenger Michelle Monaghan inspires him to work it out - fast - as director Duncan Jones follows his cult debut Moon with another sci-fi cracker.