« Avril 1999, à Mount Pleasant, dans le New Hampshire. Le corps d'Alaska Sanders est découvert près d'un lac. Onze ans plus tard, l'affaire prend une nouvelle tournure lorsque le sergent Perry Gahalowood, convaincu d'avoir élucidé le crime à l'époque, reçoit une lettre anonyme troublante. Avec l'aide de son ami Marcus Goldman, il tente de faire la lumière sur ce meurtre. »-- Résumé de l'éditeur
14-year-old Will Burrows has little in common with his strange, dysfunctional family. In fact, the only bond he shares with his eccentric father is a passion for archaeological excavation. So when his dad mysteriously vanishes, Will is compelled to dig up the truth behind his disappearance. He unearths the unbelievable: a subterranean society that time forgot. "The Colony" has existed unchanged for a century, but it's no benign time capsule of a bygone era. Because the Colony is ruled by a merciless overclass, the Styx. Will must free his father--is he also about to ignite a revolution?