After living through the Battle of Culloden, Jamie finds himself at the mercy of unforgiving British victors, until a connection from his past provides his only hope of survival. Meanwhile, a pregnant Claire attempts to adjust to life in the modern world of 1940s Boston – and life with Frank.

In prison, Jamie discovers that an old foe has become the warden – and now has the power to make his life a living hell. Over the years, Claire and Frank both put their best foot forward to share a harmonious marriage, but an uninvited guest shatters this illusion, bringing their differences to light.