There is something fishy going on in Paris. The kidnapping of journalist Pierre Martin seems to be connected to a marine expedition to the island kingdom Sitomeyang on the other side of the globe. Clues point to the mysterious organization The Octopus, whose tentacles reaches everywhere. Only a band of intrepid troubleshooters can find out how all of this is connected and solve the U-Boat Mystery. An exciting adventure which takes you from Paris to a lost U-boat on the other side of the world! Can the adventurers figure out who is behind the kidnapping, and find the secret of the lost U-boat from WW2? The adventure is suitable for 3-5 players.