Meitantei Conan OVA 04: Conan to Kid to Crystal Mother

Kaito Kid announces a new target: the Crystal Mother, Europe's largest topaz, carried by Queen Selizabeth of Ingram on a train from Tokyo to Osaka. The queen knows he is coming and hides the jewel somewhere aboard, turning the moving train into a contest of deception.

Conan is among the passengers and begins searching for Kid before the theft can happen, while Inspector Nakamori guards the queen and her treasure. But as disguises and false clues pile up, another danger aboard the train threatens to make the battle over a jewel far more serious.