The Bakers are full of excitement as they head to the English countryside to celebrate Grandfather Wilson's eightieth birthday. When an elderly neighbor with Alzheimer's disease tells a tale of treasure lost on the high seas, the Bakers are sure she has confused reality with fiction. But as they find information that supports Old Marge's story, they begin wondering whether there is truth in it after all. Can the discovery of an ancient treasure help Old Marge stay in her beloved cottage and out of a nursing home? This question sends the Bakers on a swashbuckling adventure of mystery and peril, following an old diary through mysterious caves and a maze of clues in search of the missing treasure. Along the way, their quest is marked by amazing providences that point to this key conclusion: God's ways are always right and true.