A resistance group called the Right Arm blows up the facility. They rescue Thomas, but not before WCKD captures most of his friends. Thomas learns he was a WCKD architect who designed the Maze. Overwhelmed with guilt, he volunteers for a deadly mission: cross the Scorch—a radioactive, Crank-infested wasteland—to rescue his friends.

Months later. Thomas and the remaining Gladers—Newt, Minho, Frypan, and Jorge—raid a WCKD train carrying Immunes for live experiments. They free Minho, but Newt is infected by the Flare. The virus is slowly stealing his mind. Thomas vows to find a real cure, not WCKD’s lethal extraction method.

Thomas, shattered, confronts Dr. Paige. She reveals the ultimate truth: the Immunes’ blood doesn’t just cure the Flare—it contains a memory map of how to rebuild humanity’s immune system. But to extract it fully, they need Thomas’s brain. Teresa, having switched sides again, helps Thomas trigger an explosion that destroys WCKD’s main lab. Dr. Paige dies. The facility collapses.

But in the distance, a single Crank staggers over a hill—not dead, but not human. The nightmare isn’t over. It’s only just begun.