In "Young & Christmas," Gabi and Sofia aren't able to be with their families this holiday season, so they decide to volunteer at a local homeless shelter on Christmas Eve. Yolanda is missing her kids and decides to boycott the holiday, at least until Gabi encourages her to reach out to her estranged sister, Jolanda. As soon as the siblings reunite at Josh's loft, however, old grievances are aired, and the family get-together quickly goes from bad to worse. But when Gabi discovers Jolanda is keeping a big secret from Yolanda, will the sisters finally make amends, or is more trouble on the horizon? Elsewhere, Josh goes out of his way to cheer up a miserable Elliot, who is missing Alan, while Sofia wrestles with her conscience when a department store clerk (Mindy Sterling) makes an error in her favor.

Gabi is conflicted over her feelings for Josh as she heads to Coachella with Jake. Meanwhile, Alan isn't honest with Elliot about his new hairstyle.

The music festival proves to be the perfect crowd for Gabi's munchies, though the food truck isn't the only success. It's all finally happening for Gabi, but she's left wondering, will it last? With Gabi on cloud nine, Sofia looks for new company for her misery. Meanwhile, Elliot and Alan try to salvage their honeymoon.