The rollicking Pathfinders treasure hunt continues as the five campers from Mystery of the Moon Tower get swept away in a new search for clues that may lead to untold riches hidden away long ago. Kyle, Vic, Beth, Harry, and Nate are now hot on the trail of something big! A secret staircase leads down into the unknown, setting them on an exciting chase for clues left by the wealthy explorer Henry Merriweather, who was rumored to have hidden away a priceless treasure. Are the legends real? Where will the five friends end up? And what dangers will they encounter along the way?Because as they've come to learn, everything comes at a price...