Wild Willie shows up at Geronimo's door and invites him to travel to Japan to search for an ancient, legendary samurai scroll that holds the secret to a long-lost fighting technique. The scroll's fallen into the wrong hands, and it's up to Geronimo and Wild Willie to track it down and save the day.
While Geronimo Stilton is on his way to New York City to meet his family for the holidays, his luggage gets switched with another mouse's, and he must scurry all over the Big Apple trying to find all his presents.
"My friend Hercule Poirat and I were called to investigate mysterious events at the famouse Grand Hotel in New Mouse City. There was a ghost haunting the hotel and scaring guests! It was wearing clanking armor and carrying a ball and chain. I know that ghosts don't exist, but this was pretty spooky. Would Poirat and I be able to solve the mystery of the haunted hotel?"--P.  of cover.