After Salem stows away in her backpack and gets her thrown out of the local pizzeria, Sabrina washes her hands of the cat, feigning unconcern when the feline fails to return for Christmas dinner with visiting cousin Monty. When she discovers that Salem has in fact been catnapped by a stubborn little boy named Rex, Sabrina launches a desperate plan to rescue him by impersonating Santa Claus.

After spending the weekend at Jenny's, under the advice of her aunts, Sabrina reluctantly invites Jenny to her house. However, when Jenny enters the linen closet, she ends up in the Other Realm, at the mercy of Drell.