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Claire and her parents, Jacob and Abbie, are in Italy to visit her grandfather Lawrence who owns a hotel. They normally come at Christmas but for some reason they're coming in August. But that's not gonna stop Claire from singing Christmas songs on the way. When they get there, Claire runs off to find her boyfriend Walter while Jacob and Abbie tell Lawrence that they're getting a divorce, and they're going to tell Claire here so that she's at her happy place and they ask Lawrence if he would break the news so that she can feel free to respond as she needs.

But Claire's trip is already off to a bad start when she discovers that she's Walter's winter girlfriend. He's currently hanging out with his summer girlfriend.

They drop the news, Claire is sad but not surprised. She decides to go hang out in the basement so she can be around the Christmas stuff. And she comes up with an idea - she wants one more Christmas as a family. Her parents are unsure but Lawrence is like WE'RE DOING IT! And we're flying Gams and Pop Pop out too!

One problem arises and its that one of the hotel guests hates Christmas and he brings big money to the hotel so they have to make him happy.

When Gams and Pop Pop show up, Pop Pop sees a women and immediately starts being weird. He opens up to Lawrence - he slept with this women 10 years ago and she's gonna be here all week. So Lawrence offers to cover for him as much as he can.

And Lawrence keeps finding himself in people's mess when he discovers that on Jacob's camera, there's pictures from a camping trip and he seemed to be getting cozy with another women that's not Claire.

Pop Pop decides to just stay in his room which leaves Gam to spend time by herself which leads to her actually hanging out with Claudia, the women her husband secretly had a one night stand with 10 years ago, which she opens up about how she's never quite gotten over this one night stand, not knowing she's talking about Gam's husband.

We find out that Abbie had a little something with her boss. Basically everyone in this movie is a cheater.

It finally basically all comes out right as it comes out that Claire's new puppy is missing. It's a whole thing

Claire is sad and goes to be alone. She sneaks out and finds the puppy and comes back to find out that her parents are staying together. yay?