Ryan Webster is a championship swimmer who loves his mother, worships his grandfather and barely keeps gas in his truck. When he’s summoned to a Miami hospice by his dying grandfather, he knows his hero’s life is about to end. A renowned zoologist and founder of the world’s most famous primate park, his grandfather tells Ryan about a remarkable species of monkey kept secret by the Webster men since their discovery in 1926, the year after the Scopes Monkey Trial. He insists that Ryan has a unique gift and that only he can save them and decide if the world is now ready for their revelation. Granting his last wish, Ryan sacrifices everything to make an impossible promise.
As Ryan follows his grandfather’s clues to California and beyond, he’s tracked by a relentless mercenary, targeted by a radical Christian society and hunted by the world’s most famous atheist. Aided by his Iraqi War veteran turned surfer-dude uncle and the most enchanting but deadly woman he’s ever met, Ryan discovers the monkeys can do much more than swim, and he learns their revelation will shock evolutionist, rock the foundation of the Bible and transform the life of every person on earth.
Now, his only hope to stay alive is to save the monkeys and live up to his promise to the greatest man he ever knew—and in the process become the man he’s not ready to be.