After a senseless tragedy destroys his life, Will is obsessed with punishing those responsible—even if it means leaving the Ranger Corps. His worried friends must find a way to stop him from taking such a dark path.

It is Halt who suggests the solution: Will must take an apprentice. The candidate Halt has in mind surprises everyone—and it's a request Will cannot refuse. Training a rebellious, unwilling apprentice is hard enough. But when a routine mission uncovers a shocking web of crime, Will must decide where his priorities lie—finishing his quest for revenge, or saving innocent lives?

John Flanagan makes a spectacular return to the world of Ranger's Apprentice—but what has happened since you last saw Will and his friends might shock you!