While on a second honeymoon in Scotland with her husband after World War II, army nurse Claire Randall (Caitriona Balfe) steps through an ancient standing stone circle and awakes in 1743, where Scottish rebels save her from an assault by a royal army captain who happens to be her husband’s ancestor, only to take her further into the Scottish highlands.
As Claire (Caitriona Balfe) hangs on to hope that the magical stone circle at Craigh na Dun will return her to the 20th century, Frank (Tobias Menzies) gives up on finding her.
Returning to her own time, Claire must reconcile her future with the life she left behind. Shifting back to the 18th century, Jamie, Claire and Murtagh arrive in France, but learn that Paris presents its own challenges.