This was a terrible, implausible story with very poor acting. Cillian Murphy didn't like it , either. When interviewed, he said he thought it was "schlocky". I agree with him wholeheartedly!
There were so many flaws in this unlikely story, but I'll just mention one. Cillian Murphy gets stabbed in the throat with a pen by Rachel McAdams . He pulls it out of his neck, loosely wraps a silk scarf around it, chases her through an airport and doesn't have one drop of blood showing anywhere on his white t-shirt!! Everything about this film is just as impossible as that.