Dink, Josh, and Ruth Rose are taking a trip back in time! The three friends are visiting Plymouth, Massachusetts, to celebrate Thanksgiving exactly where the holiday first began. They are incredibly excited to see the historic sites and enjoy a massive feast. However, their relaxing vacation quickly turns into an ancient treasure hunt. While exploring the town, the kids learn a fascinating local legend. A priceless sapphire necklace was secretly brought over on the original Mayflower ship four hundred years ago, and it has been missing ever since! The brilliant blue jewel is said to be hidden somewhere nearby, just waiting to be uncovered. The young detectives know they have to start searching immediately. Follow Dink, Josh, and Ruth Rose as they explore old historical sites, crack ancient riddles, and dig into the towns colonial past. You will need to keep a close eye out for clues hidden among the tourist attractions. Will the friends find the legendary sapphire before another treasure hunter beats them to it? Join the exciting search and help them solve this centuries old mystery!