Mystery on the Arctic Train! Kate and her mouse, Rupert, are preparing for a train trip to the Arctic. But, before the train even starts, mysterious and inexplicable things begin to happen. Valuable trophies, ancient scrolls, and delicious cookies disappear! Kate and Rupert, the special correspondents, set out to investigate the possible suspects, including the haughty Madame Mont and her regal cat. But the truth is more unexpected - and delicious - than they could ever imagine. Join Kate and Rupert on an exciting adventure!