Family reunions with Grandma Addy were always fun, but this one was unbelievable. One rainy afternoon in the spring, after listening to an incredible tale of soldiers fighting pirates at sea, Jacob, Sierra, and Brent decide to explore their Great-Grandma Addy's old Victorian house. Soon they discover a secret entrance that leads to an attic and an old traveler's trunk. While dressing up with clothes from the trunk, Jacob, Sierra, and Brent find themselves face-to-face with very real and very dangerous pirates. Now the kids must work together to escape the evil pirates, find the buried treasure, and return home safely.