We first meet Stacy at her bakery in Chicago, which we know not from the setting but because of her very obvious hat that has the word "Chicago" written on it in giant font.
It's established that she has a very hot, but kind of rude sous chef named Kevin (Nick Sagar), who she's known since high school and is also a single dad to a precocious, ballet-obsessed little girl named Olivia (Alexa Adeosun).
Kevin reveals he's secretly signed Stacy up for a royal baking competition in the European country of Belgravia, which will happen over the course of one weekend and she'll need to leave for on the spot to attend. Stacy, realistically, is like "Uh, that's flattering and all, but I don't have nearly enough time to prepare for this prestigious, televised competition and would rather not embarrass myself." Kevin's response is essentially "Girl you recently got dumped by the man you thought would be the love of your life and ever since you've been SO lame, get over it already and take a chance, you big loser."
She, rightly, still says no, because she's a normal person with normal expectations about life.
But of course she ends up running into her obnoxious ex, Paul, with his new girlfriend shortly after chatting with Kevin, and she tells Paul that she's competing in the event in Belgravia to sound cool, which . . . I guess means she has to follow through on? Unfriend him on social media and call it a day, Stacy.
Smash-cut to an aeroplane landing in Belgravia — yes, yet another fictional royal country ending in "-via" thanks to The Princess Diaries' influence — and Stacy, Kevin, and Olivia romping through the picturesque village where they're staying for the next two days before the competition.
By "picturesque" I mean it's covered in fake snow and every building looks like it was purchased from the shed section of Home Depot.