Mystery on a moving train!The Thea Sisters are boarding the famouse Orient Express for a journey from Paris to Istanbul! The train is a special trip to return a precious wedding dress stolen years ago from an Istanbul museum. But there's a rumour that the mysterious Acrobat Thief will steal the gown from the moving train! The Thea Sisters are determined to foil this smoky mouse's plans.Meet the Thea Sisters!Nicky is always in a good mood when she's outdoors.Colette is energetic and full of great ideas.Pamela is a peacemaker who can't stand arguments.Paulina loves travelling and helping other rodents.Violet is detail-oriented and always open to new things.