Thanks to Grandpa Pushkin: without his compass and the old nautical chart, Antje and Schlüter would probably never have ended up stranded in Pananma. They would probably have drifted all the way to Australia or even further. Although Australia wouldn't have been so bad, because Antje promptly inherited something there! However, the mysterious inheritance is tied to a difficult riddle. Will our friends "down under" find the solution?