When Santa's not delivering presents to children around the world, he's taking care of his daughter, Navy. As she grows up, her curiosity for life out of the North Pole grows intenser through the years. Having being isolated in the arctic all her life, she wants to see if she could fit in with other people. When Navy makes a reckless decision to hide in her father's sleigh on Christmas Eve, her life changes when she falls off a roof.
She meets Ace Hemmingway, a boy with a captivating personality, riveting good looks, a love for sarcasm and he is incredibly suspicious of her.
However, neither of them know he's on the naughty list.