Returning to her own time, Claire must reconcile her future with the life she left behind. Shifting back to 18th century, Jamie, Claire and Murtagh arrive in France, but learn that Paris presents its own challenges.

Life in Paris is not without its trials as Jamie struggles to triumph over his past. A fortunate meeting with Prince Charles presents opportunities, while the Duke of Sandringham's presence brings complications.

Jamie's days and nights are dominated by political machinations, while Claire finds solace in her healing skills. As their plan to stop Culloden progresses, the past threatens to derail their forward momentum.

Claire and Jamie throw a dinner party to derail investors in Prince Charles' war effort. Meanwhile, Claire's revelation that Jack Randall is alive sparks Jamie in an unexpected way as he and Claire struggle.

Reunited, Jamie and Claire attempt to extinguish the fires; however, Claire is set off on an unexpected change of course. Jamie and Claire's relationship is put to the ultimate test when the past rears its ugly head.

Jamie and Claire use Claire's medical knowledge to devise a scheme to stop a deal which could fill the war chest. When Claire learns Jamie has gone back on his word, the couple is met with dire consequences.

Claire is brought to L'Hopital Des Anges where doctors try to save her life and that of her unborn baby. King Louis asks Claire to judge two men accused of practicing the dark arts - one an enemy, one a friend.

Claire and Jamie call upon Jamie's grandsire, Lord Lovat, in an attempt to elicit support. However, a visiting Colum MacKenzie has other plans, and Lord Lovat's manipulations ensure that his own interests will be served.

Claire and Jamie reunite with the Lallybroch and MacKenzie men as they train. Jamie's power struggle and Claire's personal battle weigh upon them, but new information comes when an Englishman pays a visit to their camp.

Trusting in Claire's knowledge of "history," Jamie leads the Jacobite army into a critical battle with British opposition. Meanwhile, Claire attends to the dead and dying, a reminder of the truest cost of war.

Claire and the Highlanders are sent north after the Jacobite leaders decide to halt their march on London. A band of redcoats makes trouble for the Scots, leading to a most unexpected reunion for Claire.

As Jamie puts all of his efforts into turning the Jacobite army away from the impending slaughter, Claire attempts to comfort the sick Alex Randall. Alex reveals an outrageous plan to save the mother of his child.

Flashing forward, Claire revisits the past and reveals to her daughter, Brianna, the truth. Back in the 18th century, the Battle of Culloden has arrived, and Jamie must do everything he can to save the ones he loves.