Seattle is supposedly three days away from being hit by a megastorm, and so the hospital is gearing up by sending away any non-emergent patients and stocking up on supplies. They also have to print out all of the electronic patient records in case the power goes out, and Bailey decides she can help out by doing that since she's still not ready for surgery. She enlists Smash's help and this makes him super insecure since he's convinced that ever since Derek dumped him, people think he's a crappy surgeon.
When Owen needs help on a case Richard tries to get Bailey to help but she refuses, and he finally comes to the conclusion that she needs the figurative Band-Aid ripped off to knock her back into operating again. After the surgery, he comes out and hollers at her that when she's ordered by her boss to go into surgery, she goes, because she's a surgeon and they need her. She gets all, "You're not my boss," but he points out that he owns a piece of the hospital so actually that kind of makes him so. Plus, it was supposedly Owen who had asked for her earlier, and he IS her boss. She is supremely pissed, but as the storm rolls in she puts her and Smash's names on the surgical board so the method seems to have worked.
It's the day of the surgery for little baby Tyler and Lauren continues to charm everyone she works with, especially Arizona. The two of them flirt shamelessly throughout the day, noting that they are both total control freaks. The surgery goes flawlessly and Lauren even convinces Jackson to do part of it that he was going to just watch, so everyone is happy. Arizona then shows Lauren to an on-call room since she wants to stay and monitor the baby overnight, and once inside the storm arrives two days early, the power goes out, and Lauren cheesily tells Arizona that it's okay to lose control once in a while. As the lightning flashes, Arizona locks the door and they start tearing off each others' clothes.
As the staff is prepping, a construction worker in brought to the ER who fell three stories and had his fall cushioned by three pieces of rebar that miraculously missed all of his arteries and major organs. April is stoked for the case since she's about to re-take her Boards and she thinks this will be perfect to show what she can do. When Owen tries to take it over, she stands up for herself in a decidedly un-April way and so he lets her have it after all. Things get complicated when they realize they have to use an actual saw to cut the metal, blah blah sparks oxygen OR danger explosion blah. Ben is still at the hospital supporting Bailey and winds up helping out Owen, April, Mere and Callie come up with a way to do the surgery that hopefully won't kill them all. Owen kicks out Mere because she's 37 weeks pregnant and he doesn't want her in a potentially exploding room, and he kicks out April because someone needs to continue to stock the shelves. April gets super upset and is venting to Jackson when another trauma is brought in only once she's out in the ambulance bay, it turns out to actually be a flash mob proposal from Matthew, which Owen knew all about and that's why he was trying to keep her out of the OR. It's really cute, and she totally says yes and then shares a Meaningful Glance with Jackson that I think says she is ready to move on, but he might not be so ready.
Mere is heading up the stairs, mad because she was kicked out of the surgery, when she slips on a step and falls right on her stomach. She goes to OB to get checked out and happily, everything is totally fine and she keeps insisting to Derek that she wants to work up until she delivers. As they get ready to spend the night in the hospital she's reiterating this to him as her water breaks, and they both happily go to have their baby boy.
Owen is still conflicted by how close he's grown to Ethan, and he blows a fuse when he finds out that Grandma was asking Cristina about withdrawing care. He barely will listen to a word Cristina says, only yelling that it's not time yet. In frustration Cristina runs scans for the millionth time and happens to catch that Paul has a tiny blood clot in his brain that could explain why he hasn't woken up. Derek and Heather operate on it, and then wait to see what happens. Meanwhile, Owen finally has a talk with Meredith about how she knew that she wanted to adopt Zola and admits that he's having the same feelings about Ethan even though he knows that this could be a major issue for his relationship. But just as he comes to the conclusion that he wants to do it, Cristina happily runs in to announce that Paul is awake and fine. When Owen sees Ethan in his dad's arms, he angrily orders him moved to Seattle Pres ASAP under the excuse of the coming storm, but really because his heart is broken and he can't watching father and son together. And poor Cristina is left massively confused and hurt at his attitude towards her.
Picking up right where last week left off, Alex takes care of Princess, puts her to bed, and then runs off into the night ominously saying he's going to handle things. The next we see is Alex at the hospital with an unconscious Jason who has been beaten to a pulp. Alex is very cagey about what happened and when Mere and Cristina confront him about it, he claims Jason was already unconscious when he found him. Princess shows up at the hospital just at that moment to admit that she was the one who beat Jason up after he grabbed her arm, and that he then fell and hit his head on the fireplace but was conscious when she left. Alex sends Princess home and tells her to stay quiet, and they all keep the secret for now about what happened.
Fortunately for them, Derek is Derek so the surgery is a success and Jason wakes up but when he does, he asks to talk to the police. Alex goes to see him first and basically blackmails him into not reporting the incident; Derek overhears and then lays into Alex for the blackmail, but he also kind of lets it ride. Alex then goes home and yells at Princess for being an idiot who could have landed in jail, and she yells back that people are horrible and awful but after a few moments realizes that maybe Alex isn't horrible since he was possibly going to kill Jason himself and then was possibly going to take the fall for her. Their touching conversation is interrupted when a giant tree is then blown through the window and while it doesn't kill either of them or start a fire with all of the candles around, it signals that next week everything is basically going to be smashed to bits.
After Princess showed up on Alex's doorstep with a beaten face last week, of course he lets her in and he helps her put ice on her black eye while he asks what happened. Princess is crying (one of the few times I'll allow it) and tells Alex that she and Jason were arguing about how he can never trust her again since she lied about who she was. Well, and while I think this is a completely idiotic storyline because dude, tell your live-in boyfriend about your past, she didn't lie so much as omit, I think. Alex concludes that Jason hit her and Princess wails that it, "Just got so bad!" Let's all make a note that she didn't actually say he hit her. Mere's voice tells us that bad things always come without warning. One could argue that good things do, too, but if I said that I might be spoiling some later voiceover, oops! And also, good things coming suddenly doesn't make for the end of a Grey's season, and we're at our penultimate episode where things have to continue to fall to pieces to set up cliffhangers next week. Back to Alex, he tucks Princess into bed and assures her he's safe, then tells her to call if she needs him. It seems to have not occurred to her that he'd run out to "fix" this situation and she yells after him, wondering where he's going. He just pulls up his hood and races down the stairs.
The next morning, April walks in to work amid a bunch of people bringing in sandbags and other supplies, and looks thoroughly confused at the fuss. Owen has to explain that a massive storm with hurricane-force winds and heavy rain is three days away from hitting Seattle. Seriously, does she live under a rock? Because as someone who went for a long weekend trip to NY three days before Superstorm Sandy hit (and wound up staying a week instead) I can promise that at this point no one would have absolutely no knowledge of this coming storm. I guess Owen needed a way to tell all of us the information, though. He hands her a workbook with their disaster protocols and tells her that they need to stock up on supplies, extra beds, and gurneys since they'll probably bring in about twice as many patients as they are used to.
Owen then gathers the staff to prepare them for the storm, and he tells them to discharge any patients they can and send any long-term or post-op patients to Seattle Pres. He adds that they will be refueling the backup generators, which is one of the first things I thought of when we learned this storm would round out the season. Mere is annoyed at the idea that non-urgent surgeries will be postponed but Derek points out that she could slow down seeing as how she's only three weeks from her due date. Before Mere can bite his head off at the idea, Alex comes up and urgently asks Derek to come with him.