After living through the Battle of Culloden, Jamie is at the mercy of British victors, until his past provides his only hope of survival. Meanwhile, a pregnant Claire attempts to adjust to life in 1940's Boston.
Hiding in a cave, Jamie leads a lonely life until Lallybroch is threatened by redcoats pursing the elusive Jacobite traitor. In Boston, Claire and Frank struggle to coexist in a marriage haunted by the ghost of Jamie.
In prison, Jamie discovers that an old foe has become the warden - and has the power to make his life hell. Claire and Frank both put their best foot forward in marriage, but an uninvited guest shatters the illusion.
While serving as a groomsman at Helwater, Jamie is pulled into the intrigue British family. In 1968, Claire, Brianna and Roger struggle to trace Jamie's whereabouts, leaving Claire to wonder if they will ever find him.
Brianna grapples with life-changing revelations and Claire must help her come to terms with the fact that she is her father's daughter. Roger brings news that forces Claire and Brianna to face an impossible choice.
After decades apart, Jamie and Claire finally reunite and rekindle their emotional and physical bonds. But Jamie's new business dealings jeopardize the couples' hopes for a simple life together.
Claire returns to Lallybroch with Jamie, where she does not receive quite the reception she was expecting. Unbeknownst to her, Jamie's made some choices in their time apart which come back to haunt them with a vengeance.