by Gosho Aoyama Doc Agasa takes Conan and his young Junior Detective League pals to an old abandoned mansion for a treasure hunt. When the pint-size investigators find a mysterious box they open it and discover it is full of smashed toys and a violently stabbed teddy bear! Conan follows the trail of clues and runs smack dab into a dead old man in an attic! Who killed the old man and more importantly who killed teddy? Rating: T+