Gil, Deema, and Oona investigate as the Snow Patrol to find out who stole Molly, Goby, Nonny, and Zooli's sleeping bags, as Gil is convinced that a snow yeti is the one to blame, much to Oona's dismay.

On Christmas Eve, Mr. Grouper tells the Bubble Guppies the story of how Gil, Molly and Bubble Puppy discover Santa's lost list in the snow. To return the list safely to the North Pole, they have to keep it out of the hands of the Christmas-hating Humbug.