While preparing their pirate ship for the Anything That Floats Race, Justin and Nick discover an antique bottle riding the waves on Fourth Lake,. Inside the bottle is a key that leads the Adirondack Kids to unlock an old camp mystery.
Justin and Nick joined, Jackie in exiting the tent and stepped cautiously through the forest. Patches of fog made it difficult to see very far ahead. Gathered around the candle lantern in Jackie's hand, they listened intently for the source of the mysterious sound. "Thats growling," said Nick, His voice wavering. "That is definitely growing.".