A carefree day on the water turns into the beginning of a baffling mystery when Nancy Drew rescues a young girl from a boating accident. Grateful but frightened, the girl confides that she is alone in the world and uncertain whom she can trust. Determined to help, Nancy soon finds herself drawn into a web of secrets surrounding a lonely bungalow, a missing inheritance, and a series of suspicious strangers whose stories do not quite add up. As Nancy investigates, new questions arise at every turn. Why are certain people so eager to control the girl's future? What secrets lie hidden behind the walls of the secluded bungalow? And who stands to gain from keeping the truth buried? Using her quick wit, resourcefulness, and courage, Nancy follows a twisting trail of clues that leads from quiet lakeside retreats to moments of genuine danger. With loyal friends at her side and justice hanging in the balance, she must unravel the mystery before it is too late.