Kyle is a new kid in town who likes to draw. Vic is a cool cheerleader who's secretly a math whiz. Quiet Beth is a history buff, while goofball Harry likes performing magic tricks, with the help of his patient wingman, Nate. Five kids unlikely to form a team, for sure.

But then they're thrown together at summer camp, where they watch a grainy old movie about the history of their town, Windrose, and one of its illustrious citizens of a bygone era: the intrepid explorer-inventor Henry Merriweather. He's the one who established their camp. Merriweather's Camp Pathfinders' motto? Plus Ultra: more beyond!

The five kids soon find there is indeed "more beyond" in their pokey town with its weird weather and sudden geysers of smelly air. Deciphering a route of historical markers leads them to Merriweather's old castle, which is lined with ornate, beautiful tiles in hallways that lead to secret rooms full of odd objects--and where time itself is warped!

Kyle, Vic, Beth, Harry, and Nate witness scenes from Merriweather's past and realize his experiments and eccentricities are pointing toward a path--that could lead to the rumored lost treasure of Windrose.

This is the path our heroes are meant to follow, on a journey that will take them back and forth through time, through woods, and across waterways revealed by moonlight, right up to the looming Moon Tower itself--which holds Merriweather's secret . . . and the treasure!