Strange symbols begin appearing on the old Painted Rocks near Birchwood - shapes that seem to shift in the sunlight and glow after dark. When the Birchwood Kids stumble across a hidden pattern carved into the stone, they realize the rocks aren't just art... they're a message.
A message meant for them.
As Blair, Sam, Serena, Charlie, and Klara follow the clues, they uncover a trail of secrets buried along the riverbank - forgotten stories, hidden keys, and a mystery that reaches back farther than anyone imagined. But someone else is watching the rocks too, and not everyone wants the truth uncovered.
With friendship, courage, and a touch of Birchwood magic, the kids must work together to solve the puzzle before the next symbol appears... and the mystery deepens.
Every mystery has a key. Every key unlocks magic.