Doug the miscellaneous science guy is working at the museum. He hears a whispering noise and gets up to investigate. As he reaches out to touch the runes on the object, Dru grabs him from behind and bites into his neck. As she feeds, Angelus brings in a gang of henchvamps to steal the obelisk.
Buffy is in her bedroom, packing stakes and other supplies and talking to Willow on the phone. They share a few words about Xander's attitude, and as Buffy grabs some stakes out of a drawer, she uncovers the claddagh ring Angel gave her. The Buffy/Angel love theme starts up as Buffy sadly studies the ring. I hate to criticize, but at this point I think we really all do get it. Buffy fell in love, it went wrong, she's sad. It's been going on for at least six or seven episodes so I think we could have done without the anvilicious reappearance of the claddagh ring.
Later, Buffy patrols in a park, lookin' all Unibomber with the hood on her sweatshirt up over her head. She walks slowly and hears a noise behind her. As she turns around, Kendra da Vampire Slayer pops out of the bushes and gives Buffy a fright. They share a little blather about face-punching, and Buffy asks what Kendra is doing in her neck of the woods. Apparently, Kendra's Watcher informed her "dat a very dark power is about to rise in Sunnydale." Buffy asks if Kendra's Watcher told her what the dark power is. Did Kendra's watcher (or, to be more precise, vocal coach) also maybe tell her where it is exactly that Kendra is supposed to be from? I'm having trouble placing that accent outside of the Joey Tribbiani School of Elocution.
Back at the mansion, Spike is staring fixedly at the obelisk. He hears Angel and Drusilla approaching and snarks, "It's a big rock. I can't wait to tell my friends. They don't have a rock this big." Oh Spike, how I love thee. Angelus chides Spike for not knowing his history and then explains that the obelisk contains Acathla, a demon who "came forth to swallow the world." He was, of course, killed by one of those pesky virtuous knights that were so common in centuries past and turned to stone, "as demons sometimes do." Huh? I thought it was trolls that turned to stone. Shows what I know. So anyway, this guy was buried where "neither man nor demon would want to look. Unless they're putting up low-rent housing." Angelus signals to a couple of lackeys, who pry open the obelisk to reveal a rather unimpressive concrete-looking statue. I swear it looks like they picked up someone's rejected high-school art project. Not exactly fearsome. Drusilla, pissed that nobody has fought over her or paid her any attention in at least two minutes, begins to sway overdramatically. Angelus confirms that, if one removes the sword that is protruding from Acathla's chest, the world will be sucked into hell. Yeah, yeah, yeah. If I had a nickel for every time I heard that on this show.