After a frightening encounter with a cigar-chomping bikergang, young sisters Mae and Isla Donaldson investigate a mysterious fire thathas left no trace. The mystery deepens when a beautiful visitor speaks ofburied treasure and a hooded stranger is overheard bragging in the local pub. Curiosity turns to terror when Isla disappears on the trail of clues left by afell-walking eccentric, who has also vanished. Mae's powers of deduction andIsla's emotional insight are stretched to the limit by an audacious fraud.