The holidays have arrived, which means the students at the School of Friendship are about to leave for a two-week winter break. But just as everyone leaves the main room, a cloaked figure dumps a gooey mess onto the decorations and flees to the student housing area, where it is soon determined that the culprit could only be one of the Young 6. All of them deny doing anything wrong, so Twilight and Rainbow Dash have the Young 6 start cleaning while they question them one at a time. The consequences for the culprit will be to stay at the school over winter break for private lessons, and if none of them confess, all of them will have to stay and miss out on the holidays with their families.
As Twilight and Rainbow start questioning them, the Young 6 talk about the kind of holidays they each celebrate at home. Ocellus talks about Hearth Warming Eve being recently introduced to the Changelings, and although they managed to misinterpret just about every aspect of it, she's still proud of her society now having their own new traditions. Yona talks about a festival that (rather predictably) involves a lot of smashing stuff, but at least there's one part about doing good things for friends and family. Smolder mentions the closest thing dragons have to a holiday is where some dragons gather together and tell stories and whoever tells the best one wins a pile of gems, though what dragons consider great stories typically involve bad endings for the weak. Sandbar obviously celebrates Hearth's Warming with his family, though he doesn't really have much to share beyond the typical traditions. Silverstream explains a three-day celebration, the first day (and the original one-day version of the holiday) takes place in Seaquestria in honor of it protecting them from the Storm King, the second day takes place on Mount Aris in honor of their freedom from the Storm King, and the third day happens in both places to celebrate their unity, all finishing off with Queen Novo handing out gifts to everyone. Finally, Gallus mentions that the griffin holiday is actually little more than an excuse to barely tolerate each other.
With still nobody confessing, the Young 6 eventually start arguing with each other, until finally Gallus admits that it was him. Unlike the rest of them, he doesn't have any family at home, and with his friends being the closest he's ever had to such a thing, he decided to make that mess with the intent that cleaning it up would keep them together a little longer, but he never intended to ruin anyone's holiday. Twilight and Rainbow Dash overhear his apology, and although they're proud of him for being honest, he still has to face the consequences of staying at the school for private lessons. However, now aware of Gallus' situation at home, the rest of the Young 6 volunteer to stay at the school with him so they can all celebrate the holidays together.
What I really liked about this episode is not only learning about the holiday traditions among the other creatures, but also we got to see glimpses of the families of the Young 6. In previous episodes, we already met Silverstream's family, and we already heard that Smolder has an older brother. This time, we saw that Sandbar has his parents and a baby sister; Yona has an extended family of her parents, her grandparents, and a younger brother and sister; Ocellus presumably has her parents and two younger siblings; and Gallus has no family at all. In addition, I have to admit that the events of this episode definitely earned it's title (if you can recall a certain movie from the 80s). And it's nice that once everyone knew what Gallus has been missing out on his whole life, everyone was willing to pass on spending the holidays at home in order to give him a holiday celebration he could actually enjoy.