Joining an anthropologist's 1950 expedition to discover a lost tribe on a remote Micronesian island, a young doctor investigates and proves a theory that the tribe's considerable longevity is linked to a rare turtle, a finding that brings worldwide fame and unexpected consequence.

"The Incrementalists--a secret society of two hundred people with an unbroken lineage reaching back forty thousand years. They cheat death, share lives and memories, and communicate with one another across nations, races, and time. They have an epic history, an almost magical memory, and a very modest mission: to make the world better, just a little bit at a time. Their ongoing argument about how to do this is older than most of their individual memories....

Jack Buckles is on trial for his life. The Ministries of Secrets and Guilds, led by Ignatius Gall, are conspiring to put the Ministry of Trackers down for good-starting with Jack's very existence as a Section 13. His only hope is to prove that Gall is the real danger, not him, and it leads Jack and Gwen from the back streets of London, through the Austrian Alps, to the great reaches of central China. Joined by their new friend Liu Fai, Jack and...