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It's been five years since the first movie, and Luke is living the dad life—looking much older and forgetting to put out the trash. Stephan has moved on from being a pet psychologist to working with humans as well. He's doing press for his new book, including a radio show with some great sound effects. Taylor is still running Taylor'd Game but is struggling to find a distributor for his new game.

Luke is 42 and juggling fatherhood while still trying to be fire chief. But he's feeling a bit left out by the younger crew.

Speaking of being left out, Taylor is being left out of his building—he's getting evicted.

And speaking of being left out, Stephan's girlfriend feels neglected because she keeps thinking Stephan is going to propose.

The brothers all meet up at their mom's for dinner after accidentally destroying Thomas' Christmas show's set. They're shocked to find out that their mom is dating Pastor Roy, and they decide the best way to deal with it is by spending the holidays at mom's place.

The brothers are called to the principal's office and told that since they broke the set, they have to buy the show. In other words, they have to direct the play. The only problem is that a lot of the kids have dropped out, and they have to build the sets from scratch. They also have to do it while wearing candy cane costumes because they lost at Pictionary.

Taylor finds himself falling for the volunteer helping with the music. Her name is Caroline, and as the brothers point out, she's just a female version of Taylor.

They go on a date to an arcade and have an amazing time. They almost kiss, but they're interrupted by the brothers.

The brothers are trying to get the kids ready for the play, but they're failing. So, they call in Mark LeClerk to help. He's doing great until all the decorations cause a small fire.

The boys initially blame Pastor Roy, but then they realize they've messed up. Taylor realizes he made a mistake with Caroline and goes to make things right. They share a big kiss.

The play happens and is a big hit, despite Stephan getting stuck in the air.

The movie ends with the brothers doing a dance as they celebrate Christmas.