It's a snowy day in Pontypandy when Moose announces he is opening his 'Winter Wonderland'. Norman, Sarah and James are very excited but unfortunately when they arrive there, they find that it's all about igloo building.

When the Pontypandy Pioneers go on a day trip with Trevor to Pontypandy Island, Norman, Mandy, James and Sarah are all desperate to prove that they will be the best explorers.