When Alex is sent to spend the summer at his grandfather Sam's quiet farm, he expects nothing more than long days of chores and endless fields. But after uncovering a series of cryptic clues-a leather scrap, an old ribbon, and a brass key-Alex and Sam embark on a thrilling adventure that leads them beneath the farm's surface. From moonlit reconnoitering in the cornfields to hidden workshops and subterranean vaults, they reveal a legacy of innovation left by Alex's great-great-grandfather. As the harvest looms, each discovery binds Alex closer to his family's past and reshapes his future.
Alex's summer at Grandfather Sam's farm should have been a silent, uneventful stretch of time. Yet when he peers over the weathered fence, a world of hidden secrets beckons. Guided by an aged map and a mysterious key, Alex and Sam descend into forgotten underground chambers, uncover century-old inventions, and race against a relentless harvest to unearth rare seeds that could revolutionize farming. Along the way, Alex forges an unbreakable bond with his grandfather and learns that every fence has two sides-each holding the power to transform those curious enough to look.