Alison Shaw and her team are on the verge of achieving the greatest scientific breakthrough in history: real-time communication with dolphins. But when their research reveals a hidden object on the ocean floor, naval investigator John Clay is pulled into a race against hostile governments and shadowy insiders to protect both the scientists and the secret they have stumbled upon. The series is a science thriller grounded in real marine biology and evolutionary science.

Alison Shaw is a principled, brilliant marine biologist whose passion for her research makes her both the series' moral compass and its greatest target. John Clay, a Navy investigator, is competent, trustworthy, and pragmatic — the kind of hero who gets things done without becoming a caricature of toughness.

Across six books, Alison and John pursue ever-deeper revelations about humanity's place in the natural world — from dolphin communication to alien genetic vaults, ancient evolutionary splits, and the very code inside human DNA. Each book escalates the geopolitical stakes while deepening the pair's partnership, ultimately arriving at a discovery that redefines not just what humans are, but who they share the planet with.