Wynonna begrudgingly gets a check-up, but when the OBGYN shows her the ultrasound (and it's coming to term), she flips out and dashes out of the office. She brushes right past Doc, who escorted her there in the first place.
Easy. Juan Carlo's taken Wynonna to ye old chapel, where she must enter into a vision quest. The quest will take her into the past, where she will learn all about the location and nature of the last seal. Looks like Juan's playing both sides of the fence.
The whole gang is there! Doc. Bobo — who goes by Robert before he's sent to Hell and resurrected. Bobo's not such a bad guy turns out. He wants Doc to help Wyatt kill a demon in Purgatory that's infected Sherriff Clootie and sired two kids by his wife, Constance. Doc's not buying what Bobo's selling.
Here's the story: Sherriff Clootie went nuts-o, and started killing a bunch of people in Purgatory, demon-style. He knocked up his wife Constance with some demon kids, and also fooled around with the Widows there. Wyatt was having none of it, and shot all the infected folk down, and buried them in the ground. Constance aims to lock the Widows up, exact revenge on Wyatt, and raise her kiddies from the dead. She needs Bobo's help to do that, and right now he's desperate for her sorcery: he's dying of a wound...
Dolls has tracked down the whereabouts of Wynonna and the chapel, but he's unable to really do anything while she's still in the vision quest. So he goes out for a nice jaunt around the snowy woods, where he engages in some light shenanigans with the Widows. They try to rip him apart. Hee-hee, hoo-hah.
The joviality of the pre-baby shower party preparations is quickly interrupted by some rough news: Waverly got the results back to a genetic test she ordered. She was having some strong feelings she wasn't an Earp, and wanted science to decide it one way or the other. It decided it the other way.
Constance and Bobo have found themselves next to a well. And it ain't little Timmy that's stuck down there. It's Doc Holliday at the bottom of that well. Constance stuck him there so that she could get the ring, the ring she pried from the Widow's hand. It's got her magic stuff in it. Doc stole it, and slipped it on his own hand.
At Constance's behest, and acquire that second lease on life, Bobo tries to tempt Doc into handing over the ring on his finger. Doc refuses, and Bobo relents — he can't rob the man of the only thing keeping him alive.
Bereft of the ring, the last seal, Constance makes Bobo a wager: she'll help him out of his trouble if, one day, he promises to help her find and exhume the bones of her kids. That's the kind of deal you make once in a lifetime. If at all. Incidentally, Doc remains in the well until further notice.
Dolls, having gone full-out lizard mode, managed to crawl back from the brink of death which the Widows drove him to. He finds them feasting on Juan Carlo's body, scares them away, and then puts the old, eviscerated man out of his misery.
Wynonna isn't feeling so hot. The pregnancy, being shuttled around in time, everything's making her sick. And Bobo, Bobo's dying. So they're a match made in…Purgatory. Bobo, who's actually able to see Wynonna for some reason, thinks of her as his guardian angel. She, on the other hand, knows what he's going to become, and the she's going to kill him. With his last breath, he asks her what his guardian angel's name is. She says, Waverly. This, of course, is not correct (but explains in Season 1 why Bobo was obsessed with Waverly).
And Waverly…Waverly is having a moment. Now certain that she's not of Earp stock, she reminisces fondly of the time when Bobo saved her and her teddy from the frozen lake when she was a child. He's her guardian angel. It's a sick, twisted, love-hate, angel-demon situation. And it's getting weirder - because somewhere in the Ghost River Triangle, Bobo is raised from the dead!