Jake is burned out and lost. His ex-wife has moved on, his students are always distracted, and his novel went nowhere. Then one of his dearest chums shows him the rabbit hole, a secret time portal that leads back to 1960, and asks Jake to stop the Kennedy assassination.

Jake is burned out and lost. His ex-wife has moved on, his students are always distracted, and his novel went nowhere. Then one of his dearest chums shows him the rabbit hole, a secret time portal that leads back to 1960, and asks Jake to stop the Kennedy assassination.

Thrown by the enormity of his goal, Jake decides the one thing he can do to make a real difference is to save the family of his friend Harry Dunning who were murdered in a small Kentucky town by Harry's out-of-control father, Frank.

Finding an ally in his quest, Jake moves to a small town near Dallas to teach and constructs a double life spying on Lee Harvey Oswald. Trailing Oswald takes Jake into the dark side of Dallas where he realises Oswald may not be the only threat Kennedy will have to face.

Jake and Bill's partnership shows signs of strain as they discover more secrets surrounding the unpredictable Lee Harvey Oswald. Romance blossoms for Jake and Sadie, but by becoming involved with an innocent bystander, has Jake placed his new love in danger?

Everything begins to fall apart as Jake struggles to live two lives. When Sadie's life is threatened, Jake has to make a terrible choice, leaving Bill to his own devices. Meanwhile, Lee Harvey Oswald takes steps that will lead him toward his date with destiny.

It's October 1962, and the gathering storm of threats in Dallas continues to build. While Jake must take drastic action to establish the full dimensions of the threat to Kennedy, he's hit with an unexpected death and a bitter betrayal from one of those closest to him.

The end is near... and Jake is not up to the task. Sadie scrambles to pick up the pieces, but no one knows the mission as well as Jake. While Kennedy is still on a collision path with his shooting, Jake is concerned that he might not have altered the course of events.

The Past pulls out every weapon it has to keep Jake from reaching Dealey Plaza in time to save Kennedy. If he fails, it could mean death for Jake or others close to him. But if he succeeds, it could create a world in which he loses everything he's ever known.