Thanks the recently-revealed summary for Grey's Anatomy Season 10, Episode 15 — "Throwing It All Away" — we now know what exactly is getting tossed out: a rule, a promise, a baby, and a couple legs.

Have we piqued your curiosity? Here's the summary, as posted in an ABC press release:

Arizona [Jessica Capshaw] has a bad day which escalates when she advises one of Callie's [Sara Ramirez] patients on a potential double amputation. Derek [Patrick Dempsey] goes back on a promise to Callie, and Jo [Camilla Luddington] and Stephanie [Jerrika Hinton] find an abandoned baby outside the hospital. Meanwhile, the doctors deal with the repercussions of the non-fraternization rule, which include meetings with HR and one doctor's suspension.

First of all, what advice is Arizona giving to her maybe-double amputee? Let us guess: Don't let your spouse do the cutting — because you will resent her for it, sleep with a One Tree Hill star, break up with your spouse, and then sleep with an underling.

And hey, Derek, what gives? Another promise broken? What — are you a politician now? We already know that Mer (Ellen Pompeo) and Der are on the outs over him taking up the President on his brain-mapping offer and thus reneging on his promise to let her career shine. So what promise to Callie is he backtracking on now?

As for Steph and Jo's dumpster baby, Camilla teased that plotline last month, saying that finding the unwanted infant "is very difficult for Jo because she has abandonment issues. And she is not on the case, and she really wants to be working on it."

But the real crux of that synopsis is that one of the doctors will be sent to timeout after violating the much-discussed non-fraternization rule. Who's the scofflaw? Speculate away in the comment section below!

Grey's Anatomy Season 10 resumes on Thursday, February 27, at 9 p.m. ET on ABC.

Dan Clarendon is an assistant editor at Wetpaint Entertainment. Follow him on Twitter and Google+!