When Ben Thornton catches Millie Sullivan snooping at the mansion where he is a security guard, he joins her in her search for a lost diary she hopes will reveal a hidden treasure and the identity of her great-grandfather. Ninety years ago, Millie Sullivan's great-grandmother was a guest at oil tycoon Howard Dawkins' palatial estate on the shore of St. Simons Island, Georgia. Now Millie plays a 1920s-era guest during tours of the same manor. Then her grandmother suggests that there is a lost diary containing the location of a hidden treasure on the estate, along with the true identity of Millie's great-grandfather-- and the fortune that might be hers. When security guard Ben Thornton discovers her snooping in the estate's private library, her story seems ludicrous-- but her offer to split the treasure is too tempting to pass up. -- adapted from back cover.