While on her honeymoon, WWII combat nurse Claire Randall is mysteriously transported back to 1743 Scotland, where she is kidnapped by a group of Highlanders - and meets an injured young man named Jamie.

Frank desperately searches for his missing wife, while Claire tries to come to terms with her new marriage. Claire is faced with an emotional quandry as a life-altering opportunity presents itself.

Jamie hopes the newly arrived Duke of Sandringham will help lift the price from his head, while Claire attempts to save an abandoned 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.