The Clue of the Stone Lantern

The mystery unfolds as Judy becomes concerned about the absence of letters from Roberta's father, Captain Dunn, a sea captain. Roberta begins to recall fragmented memories of her past, which are disrupted by the arrival of a suspicious couple claiming to be related to her father and announcing his death in a shipwreck. When Roberta vanishes, Judy and Peter embark on a quest to uncover her hidden history, ultimately leading them to Chicago, where they strive to reunite Roberta with her family.