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...