Rosamond is visiting Scandinavia when she loses something. She wants Nate the Great to find it, even though he doesn't know what she lost or what country she lost it in or when she lost it. And he's thousands of miles away. But if Nate doesn't take case, Rosamond plans to hire the King of Sweden. Nate doesn't want Rosamond to bother the poor king. And he does want the chance to solve his first-ever international case. Can Nate find whatever Rosamond lost without leaving his neighbourhood?