Source Code

At the age of 16, Nina Guerrero managed to escape the deadly trap of a serial killer. Eleven years later, she's a grown woman, an FBI special agent who won't let anything get to her – and who is gaining legions of fans after a video of her effectively dealing with the attackers who attacked her in a Virginia park goes viral.
But someone else is watching.

Someone who can't make Nina forget an old grievance.

Determined to punish the one who got away, a killer from Nina's past commits a brutal crime, only to drag her into the investigation. But that is only the beginning of his game. And thanks to the internet, more people than ever will be involved this time.
His riddles and puns may have made him a degenerate social media star – a mysterious virtual ghost nicknamed Cipher –, but to Nina he is still who he once was: a monster preying on the suffering of the weak.
To catch him, she must team up with an FBI associate, psychoanalyst Dr. Jeffrey Wade. Shadows from the past haunt him too, but only together do they have a chance – trail after trail, victim after victim – to find the cold-blooded killer.

The race against time begins, with the whole world watching.