Okay, I'm distinctly torn about this episode. There were parts of it that I dearly loved, and other parts that I was not happy with. Let's just dive in to the plot, to start.
Throughout the episode, we get to see Frank's side of the story, as he searches for his wife. I'll be brief, because not a lot happens: the Inverness police think that Claire probably ran off voluntarily, but Frank won't believe it. A girl gives him a tip as to where the man from the wanted posters might be (a rendering of Jamie, from when Frank saw his ghost). When Frank shows up, it turns out to be a trap to get the reward money. Frank is set upon by some men, but he beats them off, very nearly killing one of them. He also nearly strangles the woman who brought him there to begin with. He talks to Reverend Wakefield, who suggests he leave Inverness and move on with his life before the darkness swallows him up.
Mrs. Graham tells Frank her theory about the standing stones and time travel. Frank doesn't believe it. However, on his way out of Inverness, he goes up to Craig na Dun, where he hears Claire calling for him. He calls to her, too. However, nothing happens on his end.
Meanwhile, in Scotland, we see Jamie and Claire sharing some nice quiet alone time together, when suddenly a beggar shows up. He's an old friend of Jamie's. He gives Claire a gift: a dragonfly in amber. He also tells Jamie that there's a British redcoat deserter who can help Jamie get the price lifted from his head by telling the truth of what happened when Jamie escaped from the British.