"BREAKING NEWS! Dan and Amy Cahill have been caught on camera in a Paris train station. Sources say they are about to board a slow train to Vienna. Could that be the location of one of the 39 Clues hidden around the world that lead to unimaginable power? If so, Dan and Amy better watch out. Because they're being tailed by William McIntyre--and the mysterious man in black."
3 ciphers and a coded message.
Preceded by: Card 410: Natalie's Strategy
Followed by: Card 412: The Pit Bull