A mysterious white owl leads Jack and Annie back to the Magic Tree House in the middle of the night. With a fast spin, the house takes them to the Arctic, where it is freezing cold. Luckily, they get help from a seal hunter who offers them warm clothes and a place to stay. The Arctic is surely an amazing place. Jack and Annie get to play and roll around with two polar bear cubs on the snow. However, they have been running on thin ice unknowingly.

The ice is cracking while a female polar bear approaches. Will they drown in the icy water? Is the polar bear trying to save or kill them?