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 Robert's plans to climb all the mountains near his family's Fourth Lake camp before the summer is over hit a snag when he comes face-to-face with a coyote on the trail up Black Bear Mountain.
Justin and his friends become involved in a mystery when the staged robbery aboard the North Creek Museum train in the Adirondacks turns out to be real, and the robber makes off with a treasured watch given to Justin by his grandfather.
