Christian Wolff is a math savant who works as a freelance accountant for some of the world's most dangerous criminal organizations. With the Treasury Department's Crime Enforcement Division starting to close in, he takes on a legitimate client, a robotics company where an accounting clerk has discovered a discrepency involving millions of dollars. But as Christian uncooks the books and gets closer to the truth, the body count starts to rise.

In the epic finale to the saga, Thomas leads his group of escaped Gladers on their final and most dangerous mission yet. To save their friends, they must break into the legendary Last City, a WCKD-controlled labyrinth that may turn out to be the deadliest maze of all. Anyone who makes it out alive will get answers to the questions the Gladers have been asking since they first arrived in the maze.