Lynn's extreme sports superstitions cause chaos at a professional hockey match.
On a snowy day, Lynn enters the house and discovers that her four tickets for a hockey match has arrived in the mail. Upon hearing this, the family attempts to escape, but Lynn stops them, saying because of her superstitions, she needs three of them to tag along, saying that her team, the Royal Woods Jellyfish, needs to win the game against the New Jersey Gaba-Ghouls so that they can go the championships. When the family denies tagging along because of how intense she acts, Lynn decides to forfeit going to the match. However, Lynn Sr., having been guilt-tripped by Lynn, reluctantly tags along and forces Lincoln and Luan into joining him. This cheers up Lynn, and Lincoln and Luan state that they'll tag along on the condition that they get funnel cakes and foam fingers in exchange.
At Da Barn, Lynn, Lincoln, Luan and Lynn Sr. take their seats. However, Lynn's extreme superstitions start to become an annoyance, such as sitting with their legs crossed, having powdered sugar on hot dogs and mustard on funnel cakes instead of the other way around, forcing them into sharing the same jersey when the second period starts, and making them wear jellyfish hats. When Rowdy McQuads, the star player of the Jellyfish, scores another goal, she says that he pulled off a hat trick, which requires the fans to toss their hats onto the rink. However, she discovers that Fern, the extremely stern usher of the rink, refuses to toss her hat. When Lynn does it for her, an angry Fern throws her out, but not before Lynn tells her family that she has a list of rituals under the seat.
After being booted out, Lynn discovers Mr. Grouse watching the game on his phone, saying he was kicked out for using a counterfeit ticket. When the two see that the Jellyfish are losing, Lynn schemes to get back in the arena. Upon seeing a garbage man rolling a bin of garbage, she decides to jump in to get back in the arena. Upon getting out, Fern spots her and proceeds to chase her down. Lynn takes cover in a Zamboni, which is then operated by a staff member. As the family continues to do Lynn's rituals, they spot Lynn hiding in the Zamboni, which is then surrounded by other ushers. Lynn manages to escape them (while also giving the Jellyfish high-fives and being called a penguin by the announcer), but is caught by Fern, who proceeds to throw her into the arena's jail cell, where she sees Flip inside as well, as he was selling counterfeit tickets. To make matters worse, Fern reveals that she supports the Gaba-Ghouls and gloats that her team is one point ahead and there's only one minute left on the clock, making the Jellyfish's lose inevitable. Lynn eventually gets out by using counterfeit get out of jail card from Flip.
As Lynn, Lincoln, Luan and Lynn Sr. exit, Lynn tells her family that she doesn't want to talk about the game, as she wants to spend her time cooling down. Suddenly, Rowdy McQuads arrives and tells Lynn that the Jellyfish won the game, saying that he too has superstitions that he likes to follow. He also explains that the fun of hockey comes from the unpredictability of the outcome. He also decides to take a photo with Lynn, saying that her antics have made her an interesting topic of discussion (as they all nicknamed her "Penguin"). As the four drive back home, Lynn promises to stop being superstitious... to some extent.