Captain Colter Stevens (Jake Gyllenhaal) is a decorated army helicopter pilot whose last memory is of his recent mission in Afghanistan, flying with his team while taking on enemy gunfire. He awakens on a train headed for Chicago with no memory of how he arrived there. His reflection is of a different man and his wallet says his name is Sean Fentress. Sitting across from him is a woman named Christina Warren (Michelle Monaghan) who seems to know him as Fentress. But before he can understand what is happening, a bomb goes off and destroys the train.
Stevens then awakens inside a chamber, where he is greeted through a computer screen by Capt. Colleen Goodwin (Vera Farmiga), an Air Force officer who tells Stevens that he is inside the Source Code, a program that allows him to take over someone's body in his or her last eight minutes of life. Earlier that day, a bomb exploded and destroyed a train headed into Chicago, the train that Stevens awoke on. Stevens' mission is to locate the bomb, discover who built it, and report back to Goodwin before the bomber can detonate a second larger bomb, a dirty nuclear device, in downtown Chicago which could cause the deaths of millions of people. To Be Continue ....... http://en.wikipedia.org/wiki/Source_Code
