Movies and novels are totally different mediums.
Don't bury a reader in initial boring backstory and set-up simply because you know it or need to know it in order to write the story.
The discussion you have in mind smacks of "As you know , Bob" dialogue. In other words, false dialogue simply for my benefit and for you to get across information that you can easily let me find out as the story unfolds and as and when I need to know it.
The existing owners/partners/staff, or whoever they are, would have talked about why she was needed long ago.
Let me start relaxing and making a connection with the main character as soon as you can. Make the opening interesting- it doesn't need to be 'guns blazing' action.
Start with her entering the shop if, presumably, that's an important 'change in normality' story point for her. With some careful dialogue it shouldn't be too hard to figure out why they needed her - even if it isn't spelled out in detail.
I want to know fairly quickly where I am, what's happening (in this case it will no doubt be obvious she's starting a new job in some sort of fashion establishment) and in whose head I'm supposed to be - that's me settled down, from then on it's up to you.
Good luck.
=ShannonR.;7134660]Does the main character have to be introduced in the first scene, or will the first chapter be okay? In my WIP, my main character is a new intern at a fashion designer's studio. The first scene I have is a discussion between two other characters that doesn't *name* the person the rest of it mainly focuses on, but kind of explains why she's there and why they needed her. I've seen this done in movies, but this is a novel rather than a screenplay. I wasn't sure if the discussion I mention above could be featured in the first chapter before the main character is introduced, or if it could be a prologue. It's a relatively short scene.
Thanks!