In the wake of WWII, Claire reunites with her husband Frank, but their reunion is cut short after Claire is transported back in time and meets one of Frank's ancestors.
As Claire comes to realize where she is, she has to contend with the distrust of the laird of Castle Leoch as she tries to figure out a way to go back to the standing stones.
With her medical skills earning her some favor with the MacKenzies, Claire soon attracts the ire of a fanatical priest after proving his claims of demonic possessions wrong.
As Jamie tries to convince Claire not to flee during a clan meeting, he pulls out all the stops to reach an accord with Colum after he lands in trouble.
As Claire comes to resent Dougal's tactics to get more money from the tenants, she realizes that she can recognize the cause that Dougal is trying to champion, which is bound for failure.
With Claire and Dougal in the hands of the redcoats, Claire is forced to make an unexpected decision in an attempt to escape Randall's clutches.
As Claire and Jamie make it to the altar, Claire struggles to deal with her feelings for Jamie in light of her marriage to Frank.
As Frank tries to maintain hope for Claire's return, Claire makes a desperate attempt to reach the standing stones, only to find herself at Randall's mercy one more time.
As Jamie rescues Claire, tension soon rises as their marriage is put on the line, while the rescue causes Dougal and Colum to clash.
With a bounty on Jamie's head, Claire tries to use her knowledge of historical events to secure the help of the Duke of Sandringham. As Geillis tries to manipulate events for her own gain, her schemes backfire on both her and Claire.
As Claire and Geillis stand trial, the latter makes a shocking decision that leads Claire to come to a realization about Geillis's origins. Claire is presented with the chance to return to her own time.
Jamie's homecoming takes a turn when he comes to clash with his sister, only for Claire to intervene to set things right.
As Jamie pretends to be someone else in front of the Watch, a face from his past threatens to reveal his past and blackmails him. Claire steps in to save Jenny from a difficult childbirth.
With Claire and Jenny going to rescue Jamie, Dougal bears bad news about his fate, forcing the two to resort to desperate measures to save him.
The sadistic Randall forces Jamie into submission after using Claire as leverage against him.
After a successful rescue, a traumatized Jamie struggles to move on from his difficult ordeal. Claire makes a decision to try and change history.