Claire and Geillis are captured and thrown in the thieves' hole.
There will be a witch trial, and Claire and Geillis will likely be burned at the stake.
In the hole, Geillis reveals that Laoghaire left the ill-wish (she bought it from Geillis, even) and that she, Geillis, is the one pregnant with Dougal's child, not Laoghaire.
That's why she poisoned her husband: He knew she was pregnant and that it wasn't his child.
Also, Geillis is a Jacobite, and she's been diverting her husband's money to France to help the Jacobite cause.The examiners arrive and hold a trial. A few people testify against Claire: Father Bain, the man who saw her with the waterhorse at Loch Ness, and the mother of the dead changeling baby.
Ned Gowan shows up in the nick of time to support Claire and get her a trial separate from Geillis Duncan.
They want to dunk her under water. A witch would float, but an innocent woman would sink. Claire declines this sorry excuse for a test and is whipped instead.
Jamie shows up and demands she be cut down.
However, Geillis Duncan confesses that she is a witch, "and the mistress of Satan" (25.285), which is distracting enough for Jamie and Claire to get a chance to run.
Claire realizes something, though, as she looks at Geillis one last time: She has a smallpox vaccination scar on her arm. Whoa.
Once Claire and Jamie are safely away from the village, Jamie asks Claire if she is a witch.
She explains that she isn't… but she is a time-traveler.
Jamie believes her. And he tells her that it's her birthday, October 20th, even if it is about two hundred years before she was born.
Later, Jamie takes Claire to Craigh na Dun… so that she can return to her own time.
Before she leaves, she tells him to beware the Rising—it won't succeed, and the Highlanders will die. Hundreds of them.
Jamie leaves to let Claire be alone for her trip back to the present… but she can't do it. She finds him in a nearby cottage.
He tells her it's time for them to go home to Lallybroch.