A relaxing afternoon at Sugar Creek turns into more than Bill Collins bargained for when Poetry stumbles upon a disguise hidden in the swamp. Reports of a bank robber on the loose soon surface, and as the gang investigates they discover a map that leads to more than just treasure. During a campout near the hollow tree the kids must survive an encounter that leaves them wondering if a nearby cabin is really abandoned. If they can piece together the clues that confront them, mystery and adventure await the gang in their own backyard!