It’s Christmas Eve, and everyone is fast asleep. Except Ellie the Elf, who is busy snacking on some Christmas treats. Mmm, delicious! Except ... soon, Ellie’s tummy starts aching. OUCH! Next, her bottom starts popping. Pop! Pop! Pop! Hiding away in the back of Santa’s sleigh, Ellie falls asleep. But when Santa rides off into the night, Ellie is whisked away with him and one thing is certain: Ellie and Santa are about to have a Christmas adventure like no other!