Teenagers Janie and Benjamin continue to explore the secrets of the Pharmacopoeia while Benjamin risks everything to find a way to connect with his father.

It’s 1955, and Benjamin Burrows and Janie Scott are trying to live a safe, normal life in America. It’s not easy, when they have the power to prevent nuclear disaster, and sinister forces are circling. Soon the advice of a mysterious, unscrupulous magician propels Janie and Benjamin into danger, and toward the land of the dead.

Meanwhile, their friend Jin Lo washes up on a remote island where an American spy is stationed, and finds herself on the trail of a deadly threat in China. But she’s on the other side of the world—how can Janie and Benjamin reach her?