Unnerved by the impossibility of his mission, Jake travels to Holden, Kentucky in order to save the family of his friend Harry Dunning, who were all murdered on Halloween by Harry’s father Frank. But does Jake have what it takes to kill a man?

Jake and Bill's partnership starts to struggle as they discover more secrets surrounding the unpredictable Lee Harvey Oswald. The conspiracy involving Oswald deepens, while romance blooms for Jake and Sadie. But by becoming involved with an innocent bystander, has Jake placed his new love in danger?

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 - and if he succeeds, it could create a world in which he loses everything he's ever known. What is the cost of doing the right thing?