In the present, Claire reveals the truth to her daughter, Brianna. In the 18th century, Jamie does everything he can to save his loved ones as the Battle of Culloden begins.

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.

Jamie relies upon Claire's knowledge of history to lead the Jacobite army into a crucial battle. Claire is reminded of the true cost of war as she attends to the dead and dying.

Claire and the Highlanders head north after the Jacobite leaders decide to halt their march on London. Claire has an unexpected reunion after a band of redcoats makes trouble for the Scots.

Jamie works to divert the Jacobite army away from imminent slaughter. Claire tries to provide comfort to a sick Alex Randall who shares an unusual plan to save the mother of his child.

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.

Jamie and Claire use Claire’s medical knowledge to devise a scheme to stop a wine deal which could fill the Prince’s war chest. When Claire learns Jamie has gone back on his word, the couple are met with dire consequences that will forever change their lives.

Claire and Jamie throw an elaborate dinner party intended 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 to regain their physical intimacy.

Reunited, Jamie and Claire attempt to extinguish the fires their dinner party ignited; 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.

Claire and Jamie reunite with the Lallybroch and MacKenzie men as they train for war. Jamie’s power struggles with Dougal and Claire’s personal battle with her memories of WWII weigh upon them, but new, helpful information comes to light when a young Englishman named William Grey pays a surprise visit to their camp.

Life in Paris is not without its trials as Jamie struggles to triumph over the traumas of his past. A fortunate meeting with Jacobite leader 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, including engaging the aid of a young pickpocket, the past threatens to derail their forward momentum.

Claire and Jamie call upon Jamie’s grandsire, Lord Lovat, in an attempt to elicit support for the Jacobite cause. However, a visiting Colum MacKenzie has other plans, and Lord Lovat’s manipulative machinations ensure that no matter what, his own interests will be served.